Fangrui Product Details 1. The Remote Control Does Not Contain Batteries, You Need To Buy Lr23a 12v Batteries By Yourself 2. 2020 New Arrival Upgraded With More Personalized Points: 3. Update1:multi-control In A Much Easier Way 4. Update2:new Pairing Mode With Wifi Bluetooth 5. Update3:backlight On/off Optional 6. Update4:relay Status Adjustable When Power Off 7. Update5:rf Frequency Built-in For Rf Remote Control 8. Main Features: 9. 2/3-way Multi-control Association To Control 1 Light With Multiple Dimmer Switches; Anti-scratch Tempered Glass Panel Suits Any Home Decor And Allows For Effortless Touch Control; You Can Multi-control Associate This Switch To Multiple Different Switches In Smart Life App. 10. Non-interference Control Mode; Allows The Switch To Be Controlled Via Smart Life, Touch Control, Voice, And Remote With Rf433 Frequency And 1527 Encoding Remote Switch(not Included); Each Control Method Works Independently; Achieve Multi-control By Associating To Other Smart Switches 11. Compatible With Alexa And Google Home For Hands-free Voice Control With - Dimmable; Can Also Be Controlled Via Smart Life/tuya App Anytime, Anywhere; Setting Relay Status And Remembers Last Relay Status Optional When Powered Off , Backlight Switch On/off. 12. Take Full Control Of Connected Appliances With Timers, Schedules And Countdown (1/5/30 Mins, 1 Hour, Etc.) With The App; Share Control With Family And Friends For Added Convenience 13. Neutral Wire Is Required In Your Switch Boxes To Operate Correctly; Only Supports 2.4 Ghz Network; Offers Easier Pairing Via Wifi And Bluetooth Connectivity. 14. Specifications: 15. Model : Ws-eu-d: Ws-us-d 16. Working Voltage: 100-250v Ac, 50hz/60hz 17. Max. Total Current:1a(eu)/2a(us) 18. Max. Load Power: Eu:220w(220v) 19. Us:440w(220v)/220w(110v) 20. Wireless Type: Wifi2.4g Rf433mhz 21. Working Temperature:-10-45 22. Support System: Android/ios 23. Package Included: 24. 1*smart Switch 25. 1*instruction 26. Notes: