1. Functional ZigBee Smart Human Presence Sensor Featured as human presence, human static, human Micro-type 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. Safeguard your family safely. Built in 120db alarm. There are three modes available on the APP : /Disarmed/Alarming. You can also set the alarm duration and volume in the APP. In mode, the sensor detects the presence of a person and emits an alarm sound. If you don't 't want to hear the alarm sound, you can switch to Disarmed mode 4. Advanced New Design with Multiple Settings In addition to setting alarm related parameters in the APP. It can also support setting the following parameters: Presence Keep Time/Indicator Status/Radar Parameters (Sensitivity and distance)/Motion False Detection. 5. ZigBee Hub as Control Center: Tuya ZigBee gateway 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 ) : Network: ZigBee Radar: 24G(The 24G version has lower false positive rates and more accurate features.in more complex usage environments, it is recommended to use the 24G version.) Input: USB 5V Siren Alarm Volume: Max 120db Working temperature: -10~+55 Indicator Light: Red + Blue Indicator Light Detection Angle: 110 Detection Distance: 6m/19.69ft Illumination Value: 0~2000lux Please note: ZigBee Human Presence Sensor must be used with a ZigBee gateway! Otherwise it 't work! The appearance and color of different batches of products may be different, which will not affect the use. Material: plastic colour: 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.