Optex Wired Outdoor Photoelectric Detector, 100M, 4 Channel

The SL-350QDM is a 100 metre outdoor active infrared (AIR) beam set, wired designed for perimeter security. The Quad beam set features four selectable channels making it easy to stack in beam towers as well as dual modulation and power auto-adjustment to provide a highly reliable signal transmission between receiver and transmitter even when exposed to strong sunlight or harsh weather conditions. - A spherical lenses - Including LED and sound gauge - Stackable model - Dual-modulation & power auto adjust.