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 or OFF optional Update4:Relay status adjustable when power off Update5:RF frequency built-in for RF remote control Main Features: 1.2 or 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 percent -100 percent dimmable can also be controlled via Smart Life or Tuya app anytime, anywhere setting relay status and remembers last relay status optional when powered off , backlight switch On or Off. 4.Take full control of connected appliances with timers, schedules and countdown (1 or 5 or 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 or 60Hz Max. total current:1A(EU) or 2A(US) Max. Load Power: EU:220W(220V) US:440W(220V) or 220W(110V) Wireless type: WIFI2.4G RF433MHz Working temperature:-10℃-45℃ Support system: Android or ios Package Included: 1xsmart switch 1xInstruction Notes: The remote control does not contain batteries, you need to buy LR23A 12V batteries by yourself!