This is Wireless PIR Motion Sensor Detector for Air-alarm System.Wireless PIR Motion Sensor Detector is designed to provide detection of criminal intrusion through door frames and window frames into a protected area by sensing infrared energy (heat) emitting from an intruder's body moving through a protected area.The Motion Detector Sensor combines a color camera, motion detector and recorder into a single compact and easy to use unit. Place the Motion Sensor Detector at a strategic location in your home or business and the unit will automatically start recording when it senses motion. Aside from being the only images you'll want to see anyways, wireless motion detector based recording saves on storage space and makes this Motion Sensor Detector easy to locate event footage.This Motion Sensor Detector is the best choice for you!