For the greatest level of security and immunity from false alarms, choose this sensor with both a passive infrared sensor (PIR) and an active microwave (10.525GHz) sensor in one unit. It features a huge coverage of 60x80 as well as look down "creep zone" coverage. Tamper and N/C outputs. Separate diagnostic indicators for PIR, microwave and alarms. PIR 1- or 2-pulse selection. Req. 9-16VDC.Optional Mounting Brackets The motion sensor can be mounted either in a corner or directly on a wall. For more flexible mounting options check out these swivel mount brackets: # Swivel Wall Mount Bracket (#7481B1) # Swivel Ceiling Mount Bracket