EVA LOGIK Modern Ultra-Thin Window Alarm with Loud 120dB Sound and Vibration Sensors Compatible with Virtually Any Window, Glass Break Alarm Perfect for Home, Office, Dorm Room- 8 Pack

Great product. I put them on all my glass doors and windows. They take AAA batteries and have a little light on the top that blinks red every 5 seconds or so.While I'm not going to break any glass to test efficacy, I did however pound on the glass of my door near where I placed the product, and it went off! So if someone was trying to break in, even if they weren't successful breaking the window, the product will go off. And it is LOUD! I live in a 3500+ sqft home and I can hear it upstairs in my bedroom with my door closed, air conditioner and air filter on. I highly recommend for anyone who wants to feel more secure in their home. Also, the way it adheres to the window is with a sticker that makes it clear it's a security measure. I'm definitely going to order more because the pack of 8 didn't cover every window/glass door on my first floor.

I bought these for my windows and doors. They have been a lifesaver. They work great and are reliable. There are a lot of break-ins where I live and these alarms have scared them away. This was one of my best purchases.

These are very loud and a great deterrent. I tested them by smacking the window. At the high sensitivity pretty much anything will set it off. At the lower sensitivity it takes more vibration to set it off, but my 7 lbs cat sets it off by just tapping the window right next to it, so it’s still very reliable. Took off a star because one of them has a broken light, it doesn’t flash, but it still works. It stopped working after the return period, which is disappointing. Luckily it’s on my highest window, so I’m not too worried about it. I would have been more annoyed if it was in the front of my house. I would still recommend it.

I think these are a great solution for a low-price security improvement/hack. They are SCREAMING loud and easy to install. I love the blinking light and sticker so any would-be intruders see they are there, and I know the batteries are still working. They have a setting for light or higher sensitivity. I have them on the lower sensitivity and when I tap them they squeal, so I keep them there to avoid going off on windy days. If you clean the glass with window cleaner and let it dry before you stick them on, they will stick better.BEFORE YOU PUT THE STICKER THE BACK- Pay attention to where you want the on/off switch, as well the blinking light indicator. After I put the sticker on the first one, I realized that I had limited placement, unless I wanted the writing to be upside-down/sideways. It's circular, so not a big deal, but now that one has the on/off switch and blinking light down low where it's not as easy for me to see and turn off if/when it's sounding on accident. Also, make sure you stick them where you want them: once on I couldn't pull them off to re-stick without ruining the sticker. I suspect I'll need to use something like WD-40 to get them off.

When on the high setting, it's super sensitive. You drop something too loud, it goes off. The pipes pop a little in the walls, it goes off. It's so loud, the sound "wobbles" thus sensitive areas are now on the low setting in case I need to reset them. These definitely work, and I feel safer knowing if anything is moving around the windows that the noise will make an intruder's ears bleed or at least will be annoying enough to jog on.

Install all six easily. I like the flashing LED as it will alert me when the batteries need replaced.

Perfect!

I purchased 16 of these alarms to use around the house. Out of the batch, 2 of them were completely defective and wouldn’t even turn on. I’ll be requesting replacements for those and hope they work better.During testing, I also noticed that the sensitivity varies from unit to unit even when set to the same level. Some respond easily when knocking or tapping near them, while others take a much stronger impact to trigger. That inconsistency makes me question how reliable they’ll be in a real situation.One important tip: test each alarm thoroughly before sticking it on a window. The adhesive is very strong, and once they’re on, they’re extremely difficult to remove without effort.On the positive side, the units that do work are compact and easy to install, and I like the concept behind them. If the replacements work properly and the alarms prove durable over time, I’ll feel better about the purchase. For now, I’d call it a mixed bag—potentially good, but with some quality control issues that need to be addressed.