ZigBee/Wifi 5.8/24G MmWave Radar Human Presence Motion Sensor With 16A Relay Luminance Detection 110/220V Tuya Smart Life Home Features 1.Functional ZigBee Smart Human Presence Sensor Featured as human presence,human static,human micro 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.More accurate radar measurement. We have produced both 5.8G and 24G versions, and according to different accuracy requirements, you can choose the version that is more suitable for you. 3.Supports two installation methods. You can install it on the ceiling or wall using double-sided adhesive or expansion screws. The device supports connecting to 85-265V AC power. 4.Perceived Light Intensity for Smart&Scene Linkage (1).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.(2).In this device, the Illumin threshold (0-420.00 Lux) can be set.When the device is in local(automatic) mode operation, it can beautomatically controlled in conjunction with the illumin threshold. When the actual luminance value is lower than the set illumin threshold, the local mode of the relay(breaker mode) is executed normally. When the actual luminance value exceeds the set illumin threshold, the relay remains closed regardless of whether someone is present. 5.16A relay function If you want someone to automatically turn on the light, you can try directly connecting the lamp to the sensor, which can save an intelligent switch. If you only want to use it as a sensor, you can ignore it.Three relay modes can be set in the APP.Standard (cloud linkage): It can be remotelycontrolled to turn on/off the relay through the APP.Local (automatic): If someone is present, the relaywill automatically turn on, otherwise it will turn off.not support: Disable relay.