*.Low power consumption, auto-shut off function for alarm *. Adjustable sensor head-360 degree level and 60 degree vertical orientation adjustable sensor head make it flexible to install and detect objects accurately within 6 meters distance *.Detachable sensor mask-narrow detecting angle is provided when put it onto the sensor head , *.Battery operated :4AA batteries or external adaptor :DC-6V, 600MA *.Detecting range:6 meters.60 degree.