Static human presence recognition: when someone is , the lights are off; when someone is , the air conditioner is still on. Lingpu radar human presence sensor is based on 24G millimeter wave technology. Three senses fusion, powerful and power-saving, Millimeter wave radar: detects tiny movements, Infrared pyroelectric sensor: recognizes human movement, can accidental contact caused by movement of , fans, etc.! Light sensor: recognizes ambient light, Communication method:Bluetooth-compatible Power supply: 2450 note:Dear buyer, this product supports the connection of for app to smart home, but the Chinese server needs to be switched; Colour:As Shown Material:Plastic Package Contents: 1 x Human Body 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.