1. Functional WIFI 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 homepage: Armed/Disarmed/Alarming. You can also set the alarm duration and volume in the APP. In Armed mode, the sensor detects the presence of a person and emits an alarm sound. If you don't want to hear the alarm sound, you can switch to Disarmed mode 4. Advanced 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. Specifications: Network: WIFI 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 The appearance and color of different batches of products may be different, which will not affect the use. Material: plastic colour: White