Technical specification:

operating voltage: DC 9-16V
consumption current: ≤18mA(DC12V)
operating temp.: -10ºC~+50ºC
installation mode: ceiling mounted
installation height: about 2.5~6m
detecting distance: φ8m
detecting angle: 360 degrees
alarm output: N.O./ N.C. optional
anti-dismantle switch: N.C.
dimension: φ106*36mm