The remote control does not contain batteries, you need to buy LR23A 12V batteries by yourself 2020 New Arrival Upgraded with More Personalized Points: Update1:Multi-control in a much easier way Update2:New pairing mode with WiFi Bluetooth Update3:Backlight ON/OFF optional Update4:Relay status adjustable when power off Update5:RF frequency built-in for RF remote control Main Features: 1.2/3-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. 2.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 3.Compatible with Alexa and Google Home for hands-free voice control with 0%-100% 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. 4.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 5.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. Specifications: Model : WS-EU-D: WS-US-D Working voltage: 100-250V AC, 50Hz/60Hz Max. total current:1A(EU)/2A(US) Max. Load Power: EU:220W(220V) US:440W(220V)/220W(110V) Wireless type: WIFI2.4G RF433MHz Working temperature:-10-45 Support system: Android/ios Package Included: 1*smart switch 1*Instruction Notes: The remote control does not contain batteries, you need to buy LR23A 12V batteries by yourself