Easy to install and can be used when attached to the wall Brightness sensor linkage controls on-off devices such as switches, light bulbs, sockets, motors, etc., to achieve smart home functionality USB power supply ensures continuous operation without battery concerns WiFi light sensor Power supply: Micro-USB DC 5V 1A Light range: 0–1000 LUX Detection level: 1–3 Standby power consumption: ≤ 0.5W Detection component: photosensitive diode Wireless type: 2.4 GHz Wireless protocol: IEEE 802.11 b/g/n Product appearance, color, and printed text may vary slightly between batches; these variations do not affect performance Color: White Material: Plastic Package Contents: 1 x Light Sensor Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: ±1–3 cm