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. this 120dB alarm will sound 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 it’s tampered with On/off switch is on the back of the alarm and includes a low battery indicator light Uses one 9-volt battery (not included) Country of Origin:- China