Yup !
The Visonic MCT-370 and MCT-340E are battery sipping gems.
Zigbee making the trip 50' away THROUGH the steel side of a MailBoss mailbox w/ the magnet tucked away behind the swing door and the module inaccessible to tampering.
Besides the signal RELIABLY carrying through the mailbox wall ...it's the 100 degree F seasonal temperature swings the thing tolerates in that box that amazes me,.
All those considering mounting a device in an unlocked mailbox should consider a couple things,
- doors get left open or otherwise fail introducing weather and theft potential,
- some post-people get freaked out seeing "a device" in the mailbox (and the day of "having the same post-person every day that you can explain this to" seem to be gone)
2a) there may be USPS laws against this by the way, for whatever "law" means anymore - the value of presuming there's nothing in there but junk mail, and feeling safe to just leave it for the day(s) because it's locked....is pretty darn nice.
Getting the locking mailbox has actually been more valuable than putting the sensor inside!
EDIT ADD: I should have just linked the original description of the project:
