Monoprice Zwave + Door Window Sensor

If you have access to RBoy Apps you can use the handler we’ve developed for it here:

The 24259 an excellent mailbox sensor with an easy mount/removal and tamper switch with a very handy external contact terminal built into it for using it with pre-wired boxes/doors. The handy feature is that it runs with 2 AAA batteries as you’ve probably seen.

The tamper switch part if very cool because in a mailbox it’s pretty exposed and if someone’s trying to make off with it, you can get an instant alert that’s someone’s removed it.