1.Functional ZigBee Smart Human Presence Sensor: Featured as human presence,human static,human -motion and human movement 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 devices automation. 3.Two Models Are Available: The ceiling mount can be installed like a downlight, which can be powered directly by AC; the wall mount can be attached to the wall or wherever you need it. It's as light as a wireless hub, and it's powered by USB 5V. 4. 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 alarm rate. 5. ZigBee Hub as Control Center: Tuya ZigBee is required for this ZigBee human presence sensor,performing as the center bridge for all Tuya ZigBee smart devices with extremely stable signal and a really good necessity for whole-house intelligence.(note:Tuya ZigBee hub is highly recommended for its compatibility than other ) Material: plastic Color: White Package Contents: 1 x Human presence sensor 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.