easy installation Light intensity can be detected Powered by 3*AA batteries (not included) Can connect to WiFi Can be connected to a cell phone Perceived Light Intensity for Smart & Scene Linkage Illuminance monitor in Tuya Smart APP enables its smart feature as smart scene linkage with other smart devices,especially your house lights to ON/OFF automatically as the brightness changes;Besides,you can intelligently linkage the sensor to other smart home devices for home automation. Power Suplly:3 x AA batteries(Not included batteries) Colour:White Material:Plastic Size:6.6x6.6x2.8CM Package Contents: 1 * 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.