Features: 1) MCU processing 2) Auto temperature compensation 3) Pulse count optional 4) Alarm output N.C./N.O. optional 5) LED on/off optional 6) High density SMT design 7) Can set the function to in or out to detect people 8) EMI/RFI immunity Specifications: 1) Operating voltage: DC 9~16V 2) Standby current: ≤ 20mA (DC 12V) 3) Alarm current: ≤ 25mA (DC 12V) 4) Operating temperature: -10~50°C 5) Installation height: about 2.2m 6) Detecting range: 12m 7) Alarm output: N.C./N.O. optional 8) Anti tamper switch: N.C.