GB New Linptech Human Presence Sensor ES1 Linkage Millimeter Wave Radar Inductive Static Human Recognition 6m Sensing Distance NoteRead before buying! Dear buyer, this product supports the connection of Mijia app to smart home, but the Chinese server needs to be switched; This product needs to be plugged in for use. It is equipped with USB power cord as standard. The USB interface charging head needs to be purchased separately; There are different number of purchase options, we will ship according to the order options, thank you for understanding! Basic parameters Product Name: Human Presence Sensor Product size: 50 * 50 * 20.6mm Operating temperature: - 10 ~40 Operating humidity: 0~95% RH, non condensing Power consumption: 0.5w Wireless protocol: BLE Mesh Radar frequency: 24G Light sensing range: 0-1000olux