Safety Technology International 120db Super Door Stop Alarm

Use the Super Door Stop Alarm as an entry alarm and to block a door from being opened. If anyone tries to open the door, the built-in, ear-splitting 120dB alarm sounds. Alarm stops when pressure is released from door stop plate. There is also a movement sensor with adjustable sensitivity that will activate the alarm if its tampered with. The on/off switch on the back of the alarm also includes a low battery indicator light. Uses one 9-volt battery (not included).