Active IR barrier with 2 beams. Range: 30m. 4 Frequency channels, avoid beams overlap. Has compact design with IP65 structure. Moreover, the distance between the upper and downer optics and their width is ideally designed to produce a smart pattern detection, that reduce false alarms by detecting only human intruders. Operating temperature: -35ºC / +60ºC (-30ºF / + 140ºF). AGC: Automatic gain control.