Detects if there are people in the area Millimeter-wave radar detection function can be utilized to accurately detect the sleep status of personnel easy installation With the human body presence, human body static, human body -movement and human body movement motion detection function Maximum detection distance of 9.5 meters 1. Functional ZigBee / wifi Smart Human Presence Sensor: Featured as human presence,human static,human -motion and human movement motion detection to detect the presence or absence of people in the area,even to detect the static state such as personnel sleeping accurately with mmWave Radar Detection featured. 2. Perceived Light Intensity for Smart&Scene Linkage: Illuminance monitor in Tuya Smart APP enables its smart feature as smart scene linkage with other smart devices,especially your house lights to ON/OFF automatically as the brightness changes;Besides,you can intelligently linkage the sensor to other smart home devices for home automation. 3. Advanced New Design with Multiple Settings: Set the sensitivity from 1-9 to your own need,together with minimum detect range as 0.00m and maximum as 9.5m for flexible detection demand.Meanwhile,it is designed with hold time set as 0-1500s and detection latency set as 0-10s to avoid irrelevant annoying movement and reduce false alarm rate. Note:requires plugging in to use Colour:White Material:Plastic Size:5.8x5.8x1.1cm Package Contents: 1 * motion sensor 1 * usb cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.