Top positive review
Great peace of mind
31 October 2017
REALLY LOUD!! Works great and provided us with peace of mind when staying in a hotel room after a transatlantic flight when we thought we might not hear our kids getting up to "explore" if we were dead to the world. Tested many times and works perfectly. Has never gone off accidentally and fortunately has never been needed for real.
Pros: Loud, and allows you to sleep peacefully
Cons: Check the door gap first (not always possible). My experience is that even if the door has no gap the grippy bottom of the device will provide enough force to trigger