GE Deluxe Wireless Door Alarm, 120 Decibel, Alarm or Entry Chime, Indoor Personal Security, with Keypad Activation, 45117 Deluxe door alarm perfect for homes, apartments, dorm rooms and offices. 120 decibel alarm is loud enough to make a would be intruder think twice about entering through your door and alert your neighbors of a possible break-in. Easy to use four-digit keypad for programming your custom pin - easy access buttons and controls for simple operation. Easy to install, simply mount using the provided mounting plate for temporary or permanent installation (double-sided tape and screws provided). Features "Away" and Home" modes - both chime and alarm modes for when you are home or away as well as instant or delayed alarm. Battery powered so there is no need for wiring - requires 3 AAA batteries (not included).