The MOTION ALERT ALARM uses infrared technology to passively detect motion in any area you select. This unit can be mounted horzontally or vertically. There is no need for any wiring or cabling and the unit is entirely battery operated. The unit can be disarmed by entering a personal security code that you select. The MOTION ALERT ALARM can also be used in chime mode to simply alert you of motion without sounding the alarm. AC adapter and mounting screws are included. 9 volt battery used for battery backup is not included.