Easy To Install And Can Be Used When Attached To The Wall Brightness Sensor Linkage On-off Device, Switch, Light Bulb, Socket, Motor, Etc. To Achieve Smart Home Usb Power Supply, Dont Worry About Running Out Of Battery Power. Wifi Light Sensor Power Supply: Micro-usb Dc 5v1a Light Range: 0-1000lux Detection Level: 1-3 Standby Power Consumption: Less Than Equal 0.5w Detection Component: Photosensitive Diode Wireless Type: 2.4ghz Wireless Protocol: Ieee802.11b/g/n Due To Different Batches, There May Be Differences In Product Appearance, Color, And Printed Text, Which Will Not Affect The Use. Colour:white Material:plastic Package Contents: 1 X Light 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.