Philips Personal Security Window and Door Alarm, 2-Pack, White

I'm impressed by the volume or the alarms from such a small device. I can hear it from anywhere in my home. I feel the noise will deter entry by itself, but it's settling to know I'll be aware of any entry or attempts. When my small grandchildren visit me, I'll know if they try to exit as well. The sensor very well-designed. I've had no false alarms or failures to sound as intended to date. Installation was a breeze, and the adhesive is quite strong.

I originally thought that it wouldn't work in the way we needed it to but this was really easy to install and I actually got it on clearance unless the original price was $13 I thought that it would've been a hassle having to shut off the alarm every time a door opened %26 didn't realize it had a chime until after installation but the alarm you do have to manually shut it off but it's well worth it, the chimes an added bonus- long battery life we use these on every outside door and window had it for a long long time haven't had to replace batteries once and it's used daily over and over with 3 kiddos %26 for how dangerous the apartment complex that we live in is and operates, this is coming in really handy. It works like any other alarm system, just no subscription and way easier to use.