Soundcore Sleep A20 Set by Anker with Comfortable Ear Tips and Wings

UPDATE #3 The second pair are now dying after about an hour of charging. I use them every single night all night so I guess I can't complain. What I am writing is that Anker's customer service is outstanding. Since these are still under warranty they are sending me yet another replacement. I will say again these really are the only decent option when it comes to sleep earbuds, and with there customer support you can't go wrong. UPDATE #2 7/22/25 I moved this back to 5 stars. Anker sent me a new pair and they've been working well for months. I still can't figure out how to completely disable the battery alert alarm but it's not that bad. They get 5 stars because there is simply nothing out there that comes close to these at this price. If you are looking for active noise cancelling earbuds to sleep in just buy these, they are the best option out there. UPDATE 1/9/25 These aren't even a year old and the right earbud is no longer working. They work well when they work but if they only last this long I would not suggest purchasing. I've had these headphones for two nights so far, and they have been surprisingly great. I will update the review if that changes. I have had difficulty sleeping my whole life and am very noise sensitive. I have tried everything to block out noise to sleep. I will keep this review short and to the point, but these are the best sleep headphones I have found. So far the battery life has been great and they've lasted through the night each night. They are very comfortable to sleep with. Not perfect but by far the best I have come across. They are well made and sturdy, but we will see. The one bad part so far is the Anker App. It is so stupid. The earbuds cut out when I use it, and if you want to listen to white noise for sleeping and then switch to a different app to read or something the noise stops. It is completely useless, and almost caused me to return them. Whoever makes these apps should have them field tested before selling the product. HOWEVER I just simply use a white noise app on my phone and since it is connected via bluetooth it works great and you can just circumvent the app. Anker should make these earbuds for nothing but sleep. Don't try to make them regular everday earbuds that CAN be used for sleep, just make them for sleeping. Removing a star. So while you are sleeping if the batteries die the headphones have an alert to tell you this. So they wake you up to tell you the battery is dead rather than just let you sleep.

I have been an Anker Soundcore Sleep Earbuds customer since the beginning. I purchased the original A10, then backed the A20 in the Kickstarter and purchased a second pair (for my wife) from Amazon. I also backed and received the A30 on Kickstarter and are using those presently. So, I don't give a review like this one lightly. I got my original A20 earbuds back in May 2024 and the 2nd pair in Jan 2025. Honestly, they are awesome. Sound quality is great, periodic cleaning kept them working well, they mask noise well and the battery life was perfectly fine until.... A month or so ago, my A20's got the 1.57 firmware update from Soundcore. I didn't think anything of it at the time, but the right earbud just started refusing to charge above 30%. It would charge from 0% to 30% just fine, indicating it had good contact with the pogo pins. But it simply would not charge over 30%, ever. The left earbud charged perfectly fine to 100% every time. I did some research and it turns out many others are experiencing the same issue, specific to the 1.57 firmware update. Apparently, that firmware has a known issue where it messes up the battery calibration of the right earbud and causes this exact problem. So, in short, Soundcore pushed a firmware update to my A20 earbuds and in the process made them unusable. You might think "Well, they're in the 18 month warranty, just get them replaced". I did reach out to support, and they agreed to replace the earbuds, but what happens when Soundcore pushes out a firmware update that breaks the earbuds when they are just out of warranty? If the warranty is 18 months, and Soundcore can break your device outside of the warranty at any time, this means that the device has an 18 month lifespan. So, if you are going to purchase these be aware that they should be considered disposable and you probably won't get more than 18 months of usage out of them given the above. UPDATE: 2025-12-20 Soundcore sent me replacement A20's for the ones that they damaged with their 1.57 firmware update. These new A20 sleep buds came with a much higher revision of the firmware 03.22. So, it looks like the firmware now skips from 1.50 to 03.22, as Soundcore definitely has pulled 1.57 off their servers (since it broke so many customers' A20s). But... the replacement pair Soundcore sent me were defective. The right earbud consistently discharges at more than 2x the left earbud. So for example, after 7 hours of Sleep Mode white noise playback, the left ear bud would be at 70% while the right ear bud was at 30%. I am continuing to see if I can get Soundcore to actually send me a functioning replacement for the sleep buds they broke. We'll see what happens... UPDATE: 2025-12-29 Soundcore sent me a second replacement for the defective A20's that they sent as the first replacement for the A20's they bricked with the 1.57 firmware update. So, this is now the third pair of A20s... This pair appears to work correctly, and the right and left earbud discharge battery at the same rate and look like they will achieve 12-14 hours of playback at 50% volume in Sleep Mode. So... after several weeks of back and forth, and multiple pairs of bricked or defective earbuds, it looks like I have a properly working pair again. Support was very helpful about all of this, and I found them receptive to all of the issues I was experiencing, so I don't want to be disparaging of Soundcore support at all here. In general, I've found them good to work with. But... I think the quality control of the Soundcore products is not great. I had battery discharge issues with my original A10 earbuds, and went through a similar replacement dance with those as well. It seems like Soundcore's sleepbuds are prone to battery issues very frequently, since I've now seen issues with uneven battery discharge in 4 separate pairs of A10 and A20 earbuds. My wife's A20 sleepbuds are still on the 1.50 firmware, as the 1.57 firmware has been pulled by Soundcore. I asked support about this and they confirmed that there were multiple hardware revisions of the A20's, and the replacement A20's that I got (which are on the 03.22 firmware) are a later hardware revision than the A20s that were on the 1.50 and 1.57 firmware. Support left it very ambiguous as to whether or not hardware with the 1.50 line of firmware would even continue to get firmware updates, or if that hardware revision has been effectively abandoned by Soundcore. If you are going to purchase these, you need to make sure that the firmware is the 03.22 line, and NOT the 1.50/1.57 line, since that means you have an older revision of the hardware.

UPDATE: After making my original post Anker contacted me and offered a full refund. With the excellent customer service it may be worth the gamble to see if you get good units. I'll probably be back for the A30 Sleep series whenever that's released, I hope those work better. These are great earbuds.... for the first 2-3 months. Truly the best sleep headphones I've ever used. Most of the others are cheap ones from Amazon. The Anker branded sleep headphones were the first ones I found that didn't have a very loud voice yelling in my ear "CONNECTED", "DISCONNECTED", or "POWER OFF" in the middle of the night waking me up. The fact that you can completely disable all sounds on these is great. They're comfortable for me as a side sleeper, but everyone is different, so YMMV. Now the really bad. I've had 2 sets so far, both lasted almost 3 months before the right ear is nearly inaudible. Both sets had the right ear gradually getting quieter and quieter, it's not related to ear wax build up or anything as I've regularly cleaned them and when taking them out of the case the volume is noticeably louder compared to the next morning when it is impossible to hear anything, the only way I know it's still connected is that the touch button still works and the app reports ~80% battery, my audiobook app turns off if I don't shake it every 15 minutes so most of the time I'm asleep within 15 minutes, so these get very little active use and are in standby most of the night. I got my first set replaced with warranty fairly easily, which is really the only reason they get 2*. But for the money these should really last longer than 3 months. The S10's I had before lasted over a year before one of the ears died, which isn't amazing but for that year I had the best sleep I've ever had so the higher price point is worth it, but there's a big difference between the cost being ~30 cents per day to over $2/day before they're not functioning. At this point I don't recommend these, if they worked well for more than a year it would be good but the fact that I've had 2 units fail the exact same way is disappointing. I figured the first time it happened must have been a fluke since very few reviews say anything like this happening, but to have 2 in a row with the exact same problem seems like possibly a manufacturing defect.

****6-MONTH UPDATE/EDIT: Shortly after my original review in 11/2025, the company reached out to me and ended up sending me a new pair of earphones for free! I really appreciated this and find their customer service to be phenomenal, but I wanted to wait awhile to give my final re-review. Unfortunately, my new earphones do still have the same issue as the previous pair (although I've incidentally discovered that the sound glitching is less frequent when playing a sound on Spotify or my personal downloaded library than when playing a video on YouTube, so that was a little helpful). At this point I feel certain this is due to the battery life, as the glitching/cutting out sounds don't occur until a few hours of play, and this is apparently a known problem with certain earphones. I've tried a few other things with no improvement, such as disconnecting/forgetting the Bluetooth connection and then re-pairing them, and also cleaning the sensors every couple days. No change. Again, this is an issue that I can't personally get past. Any sound disruption will wake me up, even if it's incredibly brief or small, so I've stopped using the earphones and have gone back to earplugs for now. If Soundcore or any other company ever discovers a way to completely alleviate this tiny problem, I will buy their product in a heartbeat lol. I would still highly recommend these sleepbuds to most other people, especially because I know I'm not an average person and everything else about the product is a 10/10 I think. (I've changed my rating from 3/5 to 4/5.) ****Original review: These were incredible for me at first. But after about 4 months of using them every night, I have very mixed feelings. I have a sensory disorder and have had insomnia for most of my life, as I'm an extremely light sleeper even when sleeping alone (I'm talking like combat-PTSD levels of hyperarousal), and in my 30s it's reached a point where even earplugs and a loud fan blasting at my face aren't enough to keep me asleep most nights. So after some digging online I found these, and they seemed to have overall better reviews than the Ozlo sleepbuds (the only other ones I considered) in terms of cost-benefit ratio. My thing is, when they DO work, they're absolutely perfect for me - the noise cancellation is really good, they aren't uncomfortable even for my super small ears, and they stay put throughout the night. I haven't had any issues with touching them in my sleep and accidentally switching them to the dreaded "sleep mode" like I'd seen others report in their reviews. When I use the bluetooth mode to play some white noise, I can even sleep in the same bed as my partner some nights without his snoring waking me up. These are all things I was really skeptical of/worried about before my purchase, so it felt like a miracle initially that the buds worked so well. However, after about the 4-month mark, it seems like there's something off with the audio, which is my main complaint. I always listen to the same white noise video on YouTube through the night, but I've started noticing a weird glitchy-sounding beep will play every couple minutes or so, and since my brain is insane it will ALWAYS wake me up, every time. I know these earbuds are the cause, because I don't have this problem with my airpods. The noise is hard to describe but it's just a little break in the audio that sounds like a chirp/glitchy sound, and it happens often enough that after about a week of trying and failing to just power through it, I stopped wearing the buds most nights and switched back to earplugs. I looked around online and on the Soundcore website about this being a potentially known issue that you can troubleshoot, but I didn't find anything unfortunately. This issue might not be a dealbreaker for some people with less severe hyperarousal/insomnia, but for me personally it defeats the entire purpose of the earbuds. I considered just buying a new pair, but then remembered they cost me almost $200 at the time. 😭 Honestly, this issue might not even be that bad for me if it wasn't for the cost. I just can't justify dropping another $200 on a few more months of good rest, in this economy lol. I guess for now I might save up and buy one last replacement pair, or maybe try a different brand.

Let me start by being honest; Amazon's not letting me review the new A30's here but here's my review of both A20's and the new A30's. This is posted on SoundCore's site as well: First a couple of back story statements: Amazon is now not taking reviews of the A30's unless the buds are purchased through them and since I was part of the Early Bird KickStarter and got them directly from SoundCore I couldn't do a review there (where most of the reviews are posted and viewed). It seemed that the majority of reviews on Amazon were from first time SoundCore users. I've had six months of A20 use and the same amount of time communicating with SoundCore's Support Team and Tech Team so I have some viewpoints on that. As a note I was a Bose SleepBud user for three years and experienced all the down sides of their difficulties with battery, range and software glitches that eventually drove them to decide to discontinue the product. Here's my take going from the plus side to the somewhat negative side: For those of us who had good experiences with the A20's the shift to the A30's is far easier than it would be for a first time user. The app layout is similar with some changes that take into account the ANC tech and the ability to store more than one "Land" sleep sound whether white noise or snore blocking. While this seems a little clunky unless you want to continually change sleep sounds night by night I don't see any issue with this. The setup is quite easy as were the A20's and pairing whether using the app or the Bluetooth setting is simple. The app's navigation is similar to the A20's with some needed additions to the Sound Scape variety for pre-sleep. As with the A20's the range of the buds from a phone is excellent so if you have to head to a distant bathroom or elsewhere the long range really helps. The whole reason for switching from the A20's to the A30's was the addition of ANC to the product. The A30 bud is slightly larger than the A20 but certainly still low profile and comfortable and permits side sleeping without issues. The reviews mentioning the lack of sensitivity with the touch adjustments for sound level and switching from Bluetooth to Sleep mode may be due to the need to contact the bud DIRECTLY on the flat face rather than even slightly off center. A big complaint from reviewers on both A20's and A30's is the sudden transition from Bluetooth mode to Sleep mode that's jarring and tends to wake you up with the software detects sleep. I think this is being addressed but is a definite downside for both devices. Again, similar to the A20's. I've communicated some of my concerns about the transition from A20's to A30's directly to SoundCore's teams but my chief complaint is the difficulty in SoundCore's verbiage on the directions for the products. Simple is good and my experience with both the ear buds as well as other SoundCore speakers is that their directions use quite confusing wording and in general need to be far more clear and use simple statements that don't require trying to figure out what the terminology means and what they're intended to do. Finally, I've read reviews that are critical of the ANC function in terms of how much noise the A30's is blocked out. My experience is that the ANC is not nearly as effective as either over the ear cans or competitors' like Bose's noise cancelling but in such a small package that's very comfortable for sleep positions you're not going to fit total ANC in the bud. It does reduce background noise but is certainly not capable of true ANC as of right now. Now for the positive; In the six months I've dealt directly with SoundCore their Support and Tech teams are excellent. In a business that normally does not have the ability to directly contact the manufacturer by phone the Tech team is accessible and very helpful. SoundCore Support is email only but VERY responsive in a short time frame and is very patient and helpful. I know this may seem a side issue but for anyone that's experienced product and setup direction issues being able to get quick responses and tech guidance is a game changer. SoundCore is pushing hard on brands like Bose's product placement and is now in both Verizon stores as well As Costco. With the added customers i'm hoping that the customer service gets expanded and can keep up. I know that SoundCore is working on software updates and some technical tweaks and that should help but right now not sure that switching from the A20's to the much pricier A30's is necessary. For first time SoundCore customers the A30's function well and have some features that make it worth the bucks with the proviso that SoundCore will continue the software and direction improvement.

I've had these over a year and a half now and for how expensive they were I'm pretty disappointed. These came with AI soundscapes right off the bat which is pretty easy to ignore. However I'm positive they use AI to "enhance" a lot of features in the background and that just leads to a lot of bugs. The biggest one is that the individual buds don't necessarily sync up at the same time. So I'll take it out and only one has connected, and I'll have to put them both back in the dock and then take them out again and sometimes even that still doesn't work. Or worse, one earbud and one alone will for whatever reason be completely dead despite it having been on the charging dock all day. And this is incredibly frustrating when it's late and I just want to get to sleep and now I can choose to wait longer for the other to hopefully charge or just deal with one working earbud. I've reached out to customer service and only got an AI generated response so IDK if there's any humans even actually involved. If you want to use the sleep tracking function you'll have to be ok with sound cancelling being on. Unfortunately for me, the sound cancelling just wakes me up from the sound sleep I had been enjoying, so I have to just have it completely off. Kinda seems like an oversight to not offer sleep tracking independent of noise cancelling. That all being said, when they do work they work decently well, and are somewhat comfortable though sometimes if I'm sleeping on my side it can make my ear ache a bit. I've only rarely had one pop out during sleep so they are pretty snug. But I don't think I'd buy this brand again, for this price I want something that works consistently and not 50% of the time. And also would much rather buy from a company that doesn't outsource everything to robots.

I've been on a journey for the last month searching for the perfect plugs for side sleeping, and these are the ones for me. I have two dogs that lick their lips throughout the night and it was driving me crazy. It'd wake me up and keep me up multiple times. First I tried foam plugs, and while they cancelled the noise well, they were a pain to get in properly. I needed something that I could just throw in when I get sleepy and immediately fall asleep. I then tried some $20 silicon plugs. These also cancelled the noise, and we're comfortable for a week or two, but my ears started to ache in the morning. I then decided if I'm going through the trouble of finding comfortable plugs, maybe I should invest in them. Having them play audio would be nice, especially alarms, since I'm often at events where I need to wake up before others. I then tried the Soundcore A40. This was a mistake on my part, as these aren't for sleeping. Wouldn't matter if I bought them for their intended purpose, I could not get them in my ears. No matter the tip size, they just wouldn't go in, and I'm not sure how they are supposed to for anyone, as they get really thick really fast, so not much can even fit in your ear. I left a negative review being honest about how I didn't do enough research, but how the product still failed at it's intended use case. I promptly was contacted asking if I'd like a full refund without needing to go through the hassle of returning. I accepted, and kept their excellent customer support in mind. I then tried the Ozlo Sleepbuds. These things are $300 and created by ex-BOSE engineers. BOSE used to have their own sleepbuds, having two generations before being cancelled, and people go on and on about how great they were, so surely the Ozlos would be good... They weren't. They were more comfortable than the cheap plugs, but not by much, and the audio constantly cut out. This is due to them doing Bluetooth from your phone to the case, then the case to the buds using a very low bandwidth and power saving Bluetooth format. This let's them be extremely small, but multiple audio drop outs a minute is unacceptable, so I returned them. Last shot, I went back to Soundcore and got these. They're larger than the Ozlos, but better in everyway for me. They're larger, but that isn't a problem for me since they're more comfortable. Larger also allows a bigger battery. They also don't drop out the audio! For a fraction the price these things beat the Ozlos, which is crazy to me considering how bad of a product I found the A40s to be. Extremely happy with their customer support, and extremely happy with this product.

I'm really enjoying these earbuds especially for sleeping. They are very comfortable considering I'm a side sleeper. Light weight with good sound quality. The preloaded rainfall audio freaked me out initially as I didn't realize it would start once my audiobook timer ended. It wasn't intrusive and I actually like it. The left earbud stopped working, but the FAQ on the website walked me through getting that running again. I'm still exploring all the options. Very happy with this choice for sleeping!

Je cherchais des écouteurs avec suffisamment d’autonomie, qui ne fassent pas mal aux oreilles pour la nuit. Après un mois d’utilisation je peux dire que ce produit dépasse largement mes attentes. L’ autonomie : la batterie tient toute la nuit et le boiter ne nécessite qu’une recharge par semaine environ. L’ergonomie est juste extra pour la nuit. L’écouteur extra plat se positionne parfaitement dans l’oreille. Il faut juste prendre le coup de main pour bien l’insérer et après il reste parfaitement en place. Le design du boîtier est lui aussi très sympathique, élégant et dans une matière douce. Enfin le vrai plus qui me paraissait être du gadget, c’est le mode sommeil. On bascule du mode Bluetooth au mode sommeil en tapotant une fois sur l’oreillette. J’ai l’habitude de m’endormir avec des podcasts en Bluetooth et bien évidemment lorsque je me réveille la nuit, j’ai du son dans les oreilles. Là je peux programmer l’appareil pour qu’il s’arrête au bout d’un certain temps avec la minuterie où je bascule en tapotant sur l’oreillette et l’appareil diffuse alors des sons apaisants que je peux même composer moi même. Bref je suis ravie, pour la conception très aboutie de ce produit.

W tych słuchawkach można naprawdę wygodnie leżeć na boku. Nie spodziewałem się tego, mimo obejrzanych przeze mnie recenzji, bo nawet małe zatyczki do uszu, które posiadam, wywierają presję na ucho. Tutaj prawie tego nie ma. Wreszcie mogę wygodnie słuchać audiobooków przed snem! W zestawie, oprócz standardowych gumek, są też takie przepuszczające powietrze (i dźwięk). Te są nawet wygodniejsze od tych tradycyjnych, chociaż dźwięk traci nieco na jakości (jest o wiele mniej basu). Do podcastów czy audiobooków jednak basy nie są aż tak potrzebne, liczy się wygoda. :) Gęsty stuknięciami w słuchawkę są bardzo przydatne, choć trzeba się do nich trochę przyzwyczaić (musiałem się nauczyć w nie stukać mocniej niż się spodziewałem). Ogółem, jestem bardzo zadowolony z zakupu i polecam te słuchawki każdemu, kto lubi sobie czegoś posłuchać przed snem.

I have used these headphones every day since I got them. They are comfortable enough to sleep in, which is a priority for me because my husbands snoring keeps me awake. They are easy to use, I love the case. Would replace immediately if I lost them

Hago esta reseña viniendo de unos Anker Soundcore A10 (el modelo del año pasado) que si se les podía achacar algo era la poca duración de batería en modo "bluetooth". Sin duda, este nuevo modelo corrige los problemas de la versión anterior. Será inevitable comparar ambos modelos en esta reseña (A10 y A20). Tengo acúfenos (tinnitus) y dormir sin algo que enmascare esos molestos ruidos es bastante complicado. Habiendo pasado por los Bose Sleepbuds, Soundcore A10 y como me ha crecido barba esperando los Ozlo que nunca llegan a Europa (iba a ser mayo, luego se suponía que julio, ahora dicen que a finales de julio), decidí probar estos A20 viendo la buena crítica en cuanto a batería. Llevo algo más de un mes usándolos y creo que es tiempo suficiente para poder opinar sobre ellos. CAJA: Los auriculares vienen en una caja de pequeño tamaño, ideales para llevar de viaje. Se sujetan a la caja magnéticamente. Decir que la forma de colocarse no es la más natural, y los primeros días, cuando te despiertas y los quieres guardar en la caja, no encuentras cómo deben colocarse (entre dormido que estás, no te enteras mucho). Una vez colocados en la caja, se empiezan a cargar. Se puede ver el estado de carga mediante tres led en la parte frontal. La caja en sí se abre deslizándose hacia arriba y en mi caso tiene tendencia a resbalarse de las manos. AURICULARES: Los auriculares son suaves, ligeros, pequeños. Se ajustan perfectamente a cada individuo. El fabricante incluye varias gomas para que a prácticamente todo el mundo le encajen a la perfección. Decir que se incluyen muchos tipos de pad de silicona muy suave y blandita (realmente se nota super esponjosa) y al colocarlas en tus oídos, no notas dolor, presión o nada parecido. Me encanta que casi ni se nota que los llevas puestos. Es posible que haya que combinar un pad de tamaño distinto para cada oído, por lo que recomiendo no precipitarse e ir probando distintas combinaciones hasta encontrar con el indicado. En mi caso, no tuve que hacer ningún cambio y estoy usando los que vienen por defecto. Sin embargo, estuve probando un rato. Como digo, los auriculares son ligeros, mucho. Puedes dormir perfectamente de lado que no sobresalen y no duelen (a veces con el modelo anterior, los A10, me despertaba con algo de dolor y presión). Esto no ocurre con los A20, la silicona es tan suave! MODOS DE USO: Los auriculares tienen dos modos de uso: Bluetooth, para lo que necesitaremos el móvil cerca, y el modo "autónomo" donde no necesitaremos el móvil y los auriculares reproducirán un sonido en bucle mientras los llevemos puestos. En este último modo, el sonido se carga en los auriculares y no necesitaremos el móvil cerca. Además, la batería durará mucho más tiempo. El modo Bluetooth por contra, reproducirá lo que estemos escuchando (música, podcast, ... ). Por contra, este modo reduce bastante la duración de la batería. En este punto quiero decir que si bien el modelo anterior la batería no duraba más de 4 horas en modo Bluetooth, en estos nuevo A20, siempre me despierto y queda alrededor de un 15% de batería (decir que duermo sobre las 7 horas) por lo que creo que alcanzarán unas 8h tranquilamente. Lo escucho a volumen bajo, bastante bajo, lo suficiente para camuflar los sonidos que escucho por culpa de mi tinnitus. Otro punto a tener en cuenta es que la biblioteca de sonidos que se ha incluido, además de ser mucho más amplia (tenemos todo tipo de ruidos: ruido blanco, ruido rosa, sonidos de olas, arpas, ...) son de mucha más calidad. En los A10 era un sonido de 20 segundos que se repetía en bucle y se notaba mucho cuando se terminaba y empezaba de nuevo (lo cual, ponía un poco nervioso dicho sea de paso). En estos A20, lo he probado y los sonidos son más largos y por lo menos en los que he probado, no escucho ese cambio. El modo que uso yo es el Bluetooth. Cada noche escucho Calm, donde hay melodías infinitas o playlists de 8 horas. Según lo que me apetezca, reproduzco una u otra. Voy cambiando, así no me aburro siempre de escuchar lo mismo. APLICACIÓN MÓVIL: La aplicación móvil ha sido rediseñada para estos A20, de manera que es mucho más completa. Mantiene los dos modos que he mencionado antes (Bluetooth y autónomo) pero se han añadido dos cosas: análisis de sueño y playlists para modo autónomo. Empezaré por este último, pues se pueden añadir varios sonidos de los incluidos en la aplicación a modo de playlist. No lo he probado pero he visto que lo permite. Decir que tampoco se pueden subir sonidos nuestros, es decir, si queremos usar este modo, tendremos que usar los sonidos que se incluyen en la aplicación únicamente. Por otro lado, el análisis de sueño (otro más, junto con el del Apple Watch y el RingConn) te indica las horas de sueño, tiempo de sueño profundo, etc. Un detalle curioso es el número de veces que nos damos la vuelta y el porcentaje de tiempo que hemos dormido de cada lado (derecho o izquierdo). No deja de ser curioso.Mediante esta app, también podremos actualizar la firmware de los auriculares cuando haya uno nuevo. En mi caso han llegado 2 actualizaciones. BATERÍA: Aunque lo he comentado antes, una de las cosas que más me ha gustado de estos A20 y que sin duda son una gran mejora respecto del modelo anterior, es la duración de la batería. Ahora puedo escuchar durante toda la noche lo que yo quiera, sin tener que ir a los sonidos incluidos en el dispositivo (y que insisto, han mejorado mucho). Creo que los reviews que he leído que se alcanzan 9 horas con la batería son bastante reales. Es cierto que en los A10, al cabo de unos meses la batería se degradaba con bastante facilidad, veremos qué tal va en estos. Decir también que la caja se carga mediante USB-C (no dispone de carga inalámbrica). CANCELACIÓN DE SONIDO: No, estos auriculares no disponen de cancelación de sonido. Sí que es verdad, que debido al diseño de las almohadillas (pads) puede haber una falsa cancelación de sonido. De hecho, se incluyen algunas almohadillas con un pequeño orificio que deja pasar el sonido, de manera que si tenemos niños, bebés que pueden llamarnos por la noche, los escuchemos (bueno, a priori, porque yo cuando duermo ya se puede caer el mundo). En cualquier caso, el aislamiento es bastante notable. Yo vivo en una calle con bastante tráfico y debajo hay un restaurante y con los auriculares, la melodía y demás, no escucho ni los coches ni la gente al salir del restaurante. VALORACIÓN: Sobresaliente. Creo que hoy por hoy son los auriculares perfectos para dormir. Ya digo que debido a mi problema he pasado por muchas marcas distintas (Hoomband, que como me muevo mucho se mueve la cinta, Bose Sleepbuds que por el precio que tenían acabaron siendo un fracaso a nivel de batería, Anker Sleep A10 que fueron un primer paso para entrar en este mundo y estos A20 que son perfectos). Me arrepiento de haber comprado los Ozlo, que posiblemente sean un muy buen producto pero a nivel de precio, nada que ver con estos A20, y eso que tampoco son baratos. De hecho, un factor negativo de estos A20 es el precio, creo que es algo elevado. Sin embargo, en mi caso, es el precio que hay que pagar para dormir bien y bien invertido está. Sin duda un producto muy recomendable!!

I was skeptical as unfamiliar with brand, but research suggested they had great features and are comfortable for all night use. They absolutely do everything you would expect from the top names in audio / HiFi. Alarm, sleep timer, auto switch off when detects sleep, tap to change mode or volume. Listen to music, audiobooks or a great selection of sleep promoting noises on the app The flat profile supports side sleeping and range of silicone tips ensures best fit for all night comfort Highly recommended