Fangrui Product Details Smart Home Platform:tuya Screen Size:1.8 Inch 240x240 Resolution Relay:2gangs Single Channel Less Than Equal 500w Input Voltage:ac 100v-250v(50hz) Zigbee:802.15.4 Phy or mac Zigbee Frequency Band:2.4g Operating Temperature:040depth To Wall:28.6mm Operating Humidity:-rh Non-condensing Local Switch:supports Local 2-way Switch, Which Can Be Used For Room Lighting Line Use, Such As Living Room Light, Bookcase Light, Etc. Colour:a:gray or b:black or c:white Material:pc Size:86x86x58.5mm Package Contents: 1 X Smart Dimming Switch 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. Easy To Clean And Maintain Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.