DescriptionModel Number : 92Brand Name : GauToneCertification : CEOrigin : Mainland ChinaFeature : PIR motion sensorWorking Voltage : 3V AAA*2 Alkaline BatteryWorking Current : = 80m (open space)Detecting Distance : 8m-12mInstallation Height : 1.8-2.2mSize : 40*105*26mmGauTone PA92R Wireless Motion Sensor for 433MH Home Security Alarm System Infrared PIR Motion DetectorInstallation height is about 2.2 meters above ground and the optimized detection angle for most motion sensor is 90 degree. The sensor should face the detected area with this consideration for best coverage. It is advised to install with the face of motion sensor perpendicular to the most probable moving detection of people for the highest effective detection.Before use, make sure the power switch of PIR motion sensors is at the ON position.