PIR Motion detectorDescriptionName: Wireless PIR Motion DetectorModel: XSJ-80XSJ-80 Passive Infrared Motion Detector, It is designed to detect movement by measuring ... this heat to a background setting (eg. wall). When motion is detected, the unit emits a signal to the ... sensorMainly monitor and control indoor space, generally set as Motion zoneWhen human body enters into detecting area, the sensor ...