Keep track of what s happening on your property without spending a fortune on a complicated security system with this wireless driveway monitor system. It wirelessly transmits a signal to the indoor receiver base unit when motion is detected up to 40 ft. away from the sensor. This unit has a self contained Sensor which automatically monitors the sensors and their batteries condition. Alerts you when motion is detected surrounding your garage home or business with audio and visual indicators Motion detecting range 40 ft. operating range of up to 800 ft. in an open area Supervised sensor monitors the sensors and their battery condition automatically Works with household alert receiver HA-434RL only Comes with alert and alarm features with built-in piercing 95dB siren Uses one 9-Volt alkaline battery for sensor (not included) Package contents: motion sensor mounting accessories