Optex Outdoor Detector Model : FTN ST Detection Method : Passive Infrared Coverage : 5m x 1m (16'5" x 3'3") Detectable Speed : 0.3m/s - 1.5m/s (1' - 4'11"/s) Voltage : 9.5V - 18V DC Mounting Height : 0.8m - 1.2m (2'7" - 3'11")