Mini ovi/ikkuna-anturi

I was skeptical the adhesive would hold on our uneven patio door frame, but it's been solid for three weeks now. The instant alert on my phone hits before I even hear the door creak, and the compact size means it's barely visible. Battery lasting this long is a relief since I always forget to change

Peel-and-stick took me under two minutes to attach to the patio slider, and the alert came through on my phone the instant I opened it to test. For something this small, the battery life up to that promised range gives me real peace of mind for the whole season.

Set it up on the back door in about thirty seconds, and the alert came straight to my phone when my kid snuck out. Battery life of up to a year is a huge plus, so I don't have to think about it again.