Secure contact sensor

Put one on the kitchen cabinet where we store the snacks, and the adhesive has held up through a week of daily opening and closing without budging. The notification pops up on my phone almost instantly when my kid sneaks a cookie, which is exactly the peace of mind I was hoping for.

Stuck this on the back door and the adhesive held firm through a week of 90-degree weather, which surprised me. The instant notification when the kids get home from school is exactly the peace of mind I needed, whether I'm upstairs or at the grocery store.