Easy to install and can be used when attached to the wall Brightness sensor linkage for on-off control of switch, light bulb, socket, motor, etc. to enable smart home functionality USB power supply ensures continuous operation without battery replacement WiFi light sensor Power supply: Micro-USB DC 5V 1A Light range: 0-1000LUX Detection level: 1-3 Standby power consumption: ≤0.5W Detection component: photosensitive diode Wireless type: 2.4GHz Wireless protocol: IEEE802.11b/g/n Product appearance, color, and printed text may vary slightly between batches, but this does not affect performance Color: White Material: Plastic Package Contents: 1 x Light Sensor Note: The package includes only the items listed above; other accessories are not included Note: Lighting and display differences may cause slight color variations between the product image and actual item. Measurement error allowance: +/- 1-3cm