[Dynamic breathing light] When a person is detected, the breathing light flash, and when is there, it be hidden, so that the detection status can be seen more intuitively. (breathing light can be turned off manually) [Sensitivity setting] Three-step sensitivity adjustment is used to adapt to different use environments of products, so as to avoid the situation that gives false alarm and some people miss it. [Double sending and double receiving, less false positives and high accuracy] Compared with -transmitter-one-receiver radar, it has higher detection accuracy, stronger anti-interference ability and detection range, and can penetrate insulating materials such as cloth, plastic glass and so on, so it has a application prospect in the fields of human existence detection and so on. [Active detection by 24GHz millimeter-wave radar] With a detection angle of 180 and a detection distance of 5m, it is more accurate and powerful than infrared sensing, and is not affected by factors such as temperature, illumination and dust, with high sensitivity and accurate perception of human presence. [Smart Scene] You can control in conjunction with smart products to create a completely intelligent scene. Such as: Linked with the universal infrared remote controller, automatically turn on the air conditioner and intelligent light when detecting people; Turn it off automatically when is around. Enjoy a fully automated and convenient life. [Presence time setting] There are 9 durations to choose from, which keep your presence status . For example, if you set it for 10 minutes, the air conditioner not turn off automatically when you go downstairs to get the courier back. (It is not recommended to choose "None", which is easy to misjudge) [Three kinds of state sensing] Motion sensing+micro-motion sensing+presence sensing can accurately detect various situations, not only sensing people's movements, but also including movements such as blinking, finger micro-motion, and changes in chest circumference during breathing. Within the detection range, no matter what posture you take, you can't escape detection. Precautions: 1. Radar belongs to electromagnetic wave detection sensor, and moving metal and liquid lead to misjudgment; Such as: electric fans, pets close to the radar, the shaking of metal curtains, etc., need to be well planned in the installation position. 2. It is not suitable for directly facing the air conditioner, and the motor inside the air conditioner lead to radar misjudgment. 3. The radar range is related to the target RCS, the material and thickness of the target cover, and the effective radar range change to some extent. 4. Bluetooth is only used for network signal connection and cannot be used alone. WIFI+ Bluetooth is more stable. Voltage:DC5V Current:Less than 1a Induction angle:180 Induction distance:0-5m Radar frequency:24.05-24.25GHz Transmit power:2dBm Wireless type:2.4GHz Transmission rate:250Kbps Colour:Black Material:Plastic Size:7.15x4.15x2.4cm Package Contents: 1 * Human Presence Detector 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.