1. Updated 24G radar for more accurate detection. Compared to 5.8G radar, 24G radar has a shorter detection distance (which basically meets the distance requirements of daily household use). However, 24G radar has higher range detection accuracy ( 10cm); The delay time is relatively accurate; Higher recognition accuracy; Higher unmanned preprocessing speed; And FMCW variable frequency modulation wave fast algorithm. 2. Functional ZigBee 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. 3. Perceived Light Intensity for SmartScene 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. 4. 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 dont want to hear the alarm sound, you can switch to Disarmed mode 5. 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. Colour:White Material:Plastic Size:8.8x8.8x6.6cm Package Contents: 1 * mainframe 1 * power cord 1 * screw package 1 * bracket 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.