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/ Zigbee frequency band:2.4G Operating Temperature:0-40 Depth to wall:28.6mm Operating Humidity:5%-90%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:B:Black 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.