The SL-200QDP is a 60m outdoor active infrared (AIR) beam for perimeter security. Featuring four selectable channels and dual modulation, it ensures reliable signal transmission even in strong sunlight or light interference. The beam is stackable for beam towers and can connect to an IP network via the IP/PoE module PIE-1. A version without the front cover (SL-200QDP-BT) is available for beam tower installations. Includes high-grade aspherical lenses, LED, and sound gauge.