RF433 No Battery Remote Control Wall Switch Lighting Self-Powered Wireless Switch No Wiring Required Wall Panel Transmitter. DIY Smart Switch RF433Mhz Wireless Remote Control, Panel Transmitter Self-powered wall-mounted, works with Alexa Google Home, ensures a better switch user experience, bringing your smart life much more convenience and fun. Packing List A receiver with a transmitter together Note: The package includes different products because you choose another option. 2 * double-sided tapes for each transmitter Receiver technical data: Model number: KR2201- 4. RF working mode: Superheterodyne reception. Modulation mode: ASK. RF frequency: 433 MHz. < p>Input voltage: AC 85V ~ 250V. Standing current: 5mA. Remote control range:&gt; 50 m (free space). Output terminal: NO, COM, NC. < br> Multi-functional switch One switch controls multiple receivers and multiple switches control one receiver. Paste wherever you want. Works well without WiFi / battery Thanks to the self-powered function of the switch, it works well with the receiver to control connected devices without WiFi or battery. The signal can transmit through the wall Indoor: up to 30m Outdoor: up to 100m < br> Toggle button Different from the traditional button, the toggle push button makes your life easier and more convenient. Collect money power from your finger No battery needed No wiring required Overload protection NOTE Both should be purchased and used together to get full use and convenience. Choose the number of receivers and controllers as needed for your usage scenario.