Features:
The side of the door stopper alarm has sensitivity adjustment switch, toggle "Sensitivity" switch, H: placed with the door, the door opened pressure sensed iron will sound an alarm, or is placed doors and windows, as long as the touch products itself will sound an alarm; M key and the L key function consistent effect for the door, then opened the door a pressure sensed iron, alarm.
When closing the rear door plug power switch, treble 120 db siren will not be activated, can be used as an ordinary slip door plug to use.
No need to install, a 9V laminated battery-powered, easy to carry, especially suitable accommodation when you travel used effectively in an unfamiliar place for your timely warning!
For the bottom of the door and the ground clearance between 1 cm and 3.5 cm .