Detects if there are people in the area Can be connected to a cell phone easy installation Supports connection to WiFi Sensing angle 180 Communication protocol: WIFI 2.4GHz, NO need any gateway or hub to work. Function introduction: real-time detection of whether someone exists, -motion detection (heartbeat, breathing, etc.), motion detection. It can be intelligently linked to smart products such as graffiti switches, , curtains, etc., to achieve energy saving and environmental protection, elderly monitoring, security alarm, hotel room management and other functions. App control: Tuya or Smart Life App to check the device status and view the history at any time. Differences from traditional human PIR infrared sensors: PIR infrared sensors can only detect human motion, but cannot detect when people are still, and the false alarm is serious. The human presence sensor adopts the principle of radar and microwave, and the detection is real and reliable. It can penetrate obstacles such as glass and gypsum board, and can detect human breathing and heartbeat. Colour:White Material:Plastic Size:7x7x2.7cm Package Contents: 1 * sensor 1 * power cable 1 * screw package 1 * double-sided tape 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.