Product Details 1.Selectable frequency 4 channels : Stacking, Straight line, Square or other various applications are allowed. 2.Professional waterproof design with rubber seal around, anti-rain, snow, dew, mist, frost etc, IP65 ingress protection. 3.Triple beam: interval of 3 beams is 20cm, improves the ability of anti-false alarms. 4.Intelligent temperature control system, pre-set heater terminals. 5.Environment adaptive function, according to external environment changes, timely adjust to adapt the state, reduce the false alarms rate. 6.AGC circuit, the detector will automatically increase sensitivity when faced harsh environment. 7.Horizontal ±90° / vertical ±10° optical angle can be easy to adjust. 8.LED display signal grade for easy alignment. 9.Adopt digital DIP technology, frequency, sensitivity, indicator and operation power can be adjusted through DIP switches.