Optex Outdoor Battery Operated Photoelectric Detector, 4 Channel

The SL-350QFR is a 100 metre battery-powered outdoor active infrared (AIR) beam set which is designed for perimeter security. The Quad beam set is completely wire free and can be quickly installed in remote or hard-to-wire areas. It also features four selectable channels making it easy to stack in beam towers. - 100 metre wireless Quad beams set - Accommodates most wireless transmitters - Weather protection IP65 - Sniper viewfinder - WIRELESS-READY