30 PCS NFC Tags Stickers - NTAG213 Chip, Blank, Adhesive Labels, RFID Tags, Rewritable, 137 Bytes Memory, Compatible with All NFC-Enabled Smartphones and Devices

These do work with Ubiquiti/Unifi/Access readers (if you turn on "3rd party" cards option), although they are very low security (since any phone with NFC can read/impersonate them). But they are great if you don't need that level of security. They *are* pre-programmed with a 10-digit number on each tag (although it is not printed anywhere; you can use a USB HID reader and obtain the number if needed, or read it from a phone app). And it appears to be somewhat random (not sequential). The first 4 tags were numbered 2458982148, 2458981124, 2459045892, 2459048964. I can't spot the pattern, if there is one, other than the numbers are increasing. I don't know if different batches would have tags with the same number, but it is possible. It might even happen in the same batch (which could be problematic). Of course, you can reprogram the number to something else, but that is an additional hassle and wouldn't help with knowing if that number was already used. I do wish they enclosed documentation with the exact numbering methodology/scheme; it wouldn't cost them hardly anything to do (1 piece of paper). Anyway, I tested sticking these to the back surface of ID badges, and so far they seem to hold up well (if you clean the surface first). None of the several I have been using with people for several weeks have failed in any way. They are reasonably sticky and constructed well and easy to remove from the backing. Then I tested actually laminating these INSIDE newly-made ID badges. To my surprise, the heat/pressure didn't damage them and they work fine! Also didn't seem to affect the range. With the Unifi readers, that seems to be about under 1 inch or so, which is reasonable for such a small tag. Overall, I am very happy. Except for not knowing how they are numbered, they are nearly perfect for what I wanted to do and will likely buy many more.

The LeadSeals 30 PCS NFC Tags Stickers with NTAG213 chips have been a fantastic addition to my tech toolkit. Functionality: These tags are rewritable and programmable, allowing for repeated edits or setting them to read-only mode for added security. UBUY Compatibility: They work seamlessly with all NFC-enabled smartphones and devices, making them highly versatile for various applications. WALMART Design: The adhesive backing is strong, ensuring they stay in place once applied. The white finish blends well with different surfaces, maintaining a clean look. Durability: Made from environmentally friendly PET material, these tags are waterproof, smooth, and wear-resistant, ensuring longevity even in various conditions. AMAZON Memory Capacity: With 144 bytes of memory, they are sufficient for storing URLs, contact information, or other small data sets. SHOP NFC Overall, these NFC tags are reliable, easy to use, and offer excellent value for various NFC applications. Highly recommended!

I use these NFC tags inside products that I design and manufacture, and they've worked exceptionally well. Even after being embedded inside the material, they read reliably with a smartphone, making them a simple and effective way to add a digital component to my products. I use them as a digital signature, allowing customers to interact with or verify the item without affecting its appearance. The adhesive backing makes them easy to position during assembly, and I've found them to be very reliable once installed. They're also very cost-effective. For anyone creating custom products, artwork, collectibles, or other handmade items, these tags are an inexpensive way to add a professional, modern touch without significantly increasing production costs. Overall, they've been dependable, easy to work with, and exactly what I needed for my projects.

I've four so far for various automations in the iOS Shortcuts app on my iPhone and they've worked well. But note, it seems like sticking them to a conductive surface permanently disables them. I tried sticking one to a piece of silver trim in my car (which I thought was plastic) and the tag stopped working even after I peeled it off and it visually seemed fine. I thought it was a dud so I tried another tag and the exact same thing happened (and I verified it was working right before sticking). But as long as you avoid metallic-looking surfaces, they seem to work well. I'm only using these to trigger automations on my phone, so I have not attempted to read or write any data with them. They're quite compact and easy to stick onto anything. They unlock a lot of possibilities: any routine task you do, app you open, or setting you change that is associated with a location or object can now be automated.

Mirror what the other reviewers say, with my own two cents. It's really easy to use with any NFC app you find on the app store. I have an iPhone so I usually use NFC Tools, but I bounce between a couple just to make sure that the commands are working. The sticking quality is really good. For speed, that depends on your data/connection so that's user error. And for functionality, just make sure that your device can do NFC things like the "Tap-to" function. My complaints are that the package it arrives in is SO suspicious. It's an envelope with a line of these- clearly ripped from a roll. I wish it came as a washitape roll instead of a creepy piece of torn paper. It makes you nervous to tap your device, but at least it functions well. In addition, make sure to allocate one or two test tags, as sometimes the commands won't erase fully- and there's nothing you can do about it. Learnt this the hard way.

I Haven't used all 50 yet but so far they are working great! Read, write, and write protection are all functioning properly so far. I'm using a free app on a Samsung Android device to write and read them. I've seen many people complaining about NFC tags online so I'll note this in case it's helpful for someone: Make sure there is adequate space from metal parts because tags like these use an electromagnetic field and especially ferrous metals (like steel) will stop it from working. Also make sure you separate the tag you want to write to from the rest of your tags before writing. Place the tag right where the NFC antenna is on the back of your phone to write or read it.

Not what I expected? appears on roll and they were sent individually.

Good purches for the price , fast shipping , and works as advertised

El producto funciona muy bien y se programa fácilmente con nfc tools. Lo he probado y usado tanto en iPhone como en Android y funciona de maravilla.

Works great! Embedded into a plastic ring that is 3mm thick, picked up by several phones. Worked best with apple devices, android surprisingly was hit or miss. Read through phones with cases as well. Great range. Id say upto 10mm applications should be fine.

10/10 recommend! I used these on my press on nails to make business card keychains and they work great!

Works perfectly easy to reprogram There are some range issues with this one.. have to bring it really close to the sensor for it to work which are located at different places depending on the brand/model of the phones. Regardless gets the job done

Doesn't work says there is an error