Brand new in the box, never opened Sells for $30 plus tax at Walmart. 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).