Great for doors, sheds and garages, this Secure Pro Keypad Alarm System set is a wireless, battery operated 110dB alarm featuring magnetic sensor technology. When magnetic contact is broken, the alarm will sound. Alarm has 3 settings: instant, delay and chime. Panic button immediately activates the alarm. Keypad arms and disarms the alarm. Requires 3 "AA" batteries (not included). Simple to install, requires no wiring. Instructions for use are included on back of box. Comes packaged in an individual window box.