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 120 dB alarm will sound. There is 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. Uses one 9-volt battery 􏰊􏰋(not included).
 
Unit size: 6_3/4" x  1 3/4"