The 100-decibel alarm is no joke—we tested it once by accident and it scared the dog. The 2-year battery claim is what sold me, since I won't have to climb up to change it on our high windows.
Hannah X.★★★★★
Slipped one of these onto my back door frame and it's barely noticeable, which is exactly what I wanted. The 2-year battery claim is what sold me since I won't have to mess with it for a while.
Scarlett★★★★★
The 100-decibel siren on this thing is no joke — I tested it once and my ears rang for a minute. It's slim enough that it disappears against my window trim, and not having to think about a battery swap for two years sealed it for me.