Features: 1. Ultra-Small Size Diy Light Switch Module; 41x41x22mm Ultra-Small Size Body, Compatible With 95% Of Installation Boxes On The Market. The Small Switch Module Can Be Easily Installed On The Switch Mounting Box Or Light. (Note: Please Turn Off The Power During Installation) 2. With , Schedule, And Countdown Functions, You Can Set A Schedule According To Your Personal Needs, And Time And Countdown To Maximize Your Intelligence And Diy Your . 3. State Memory Function, The Switch State During Shutdown And Recovery Can Be Set To On, Off And Remain The Same As Before Shutdown. 4. Group Control, Sharing And Linkage Functions 5. Tuya Smart Wifi Four-Way Switch Smart 4-Way Switch Mini Cassette Switch Smart Home, Can Be Connected To 4 Light Bulbs Description: 1. Wiring Method: Zero Live Wire 2. Rated Voltage Range: 100-240V 3. System Support: Alexa 4. Switch Type: Push Button 5. Switch Mode: One Open And Two Controls 6. Control Method: Single Control Once Opened 7. Tips:Can Directly Connect To 2.4G Wifi 8. Product type:4 Gang WlFl Switch Module 9. Max. load: 2.5A 10. Operation frequency: 2.412GHz-2.484GHZ 11. Operation temp: -10+40 12. Protocol: WIFI IEEE 802.11B/B 13.Operation range: Less than 100m Material: ABS colour: As shown Package Contents: 1 x Tuya Smart Switch 1 x English Instruction Manual 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.