[Communication protocol]you can check the device status with the mobile App. [Function introduction] Real-time detection of whether someone exists, - (, breathing, etc.), [Accurate detection of dynamic]static human presence This product uses advanced millimeter wave technology to accurately detect whether there are people in the area,whether they are moving or stationary Accurate recognition and wide range perception: human or animal movements Built in multiple people and precision sensors, the presence of people in the room can be accurately identified through intelligent algorithm. Conical detection range, applicable to room area of 6-25 square , induction angle of 90 degrees. The diameter of human sensing range is about 3 (installation height is 3 , ground projection) [Intelligent linkage]It can create intelligent scenes with Tuya switches, , curtains and other intelligent products to achieve energy saving, environmental protection, security alarm and other functions.With other intelligent devices, it can realize automation and scene control. Make intelligent hardware respond faster and control moresmoothly. It can still be used even if is disconnected. [Difference from human PIR infrared sensor]PIR infrared sensors can only detect human motion, cannot detect when people are still, and the alarm is serious.The human presence sensor adopts the principle of , and has the functions of human presence, human stillness, human -motion and human . Detection signal: 24g millimeter wave Communication protocol:WiFi Power input: 5v1a Installation : flat / ceiling mounted Colour:black Material:plastic 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.