Mini Wireless Light Switch Kit, No Wiring, No Batteries, Easy Installation, Outdoor Remote Control Up to 200M Wireless Remote Control: Control your electrical application with the wall transmitter within the desired range. No WiFi/Battery Control Required: With the self-generating function of the wall panel remote transmitter switch, you can remotely control a device connected to the RF433 relay receiver without WiFi or batteries, just match the switch to the receiver and go. Besides, the rocker button provides a lot of convenience for your smart life. Multi-function switch: One wall panel remote transmit switch can control multiple RF433 relay receivers, and multiple wall panel remote transmit switches can also control one RF relay receiver at the same time. Adhere the switch with double-sided tape. Note: RF433 Relay Receiver and Wallboard Remote Transmitter Switch must be used together of the same type, so you cannot buy a receiver or a switch separately, or use a self-generating wallboard transmitter to connect other types of receivers. multifunction switch One switch controls multiple receivers, and multiple switches control one receiver. Tick any place you like Works well, no WiFi/battery required With the switchs self-powered capabilities, it can be used with the receiver to control devices that dont require Wi-Fi or battery connectivity. Signals can be transmitted through walls Indoor: up to 30mO Outdoor: up to 100m rocker button Unlike traditional buttons, rocker buttons make your life easier and easier to operate. Harvest energy from your fingers No battery required No wiring required Environmental friendly Overload protection notes Both must be purchased and used together to be fully utilized and convenient. Select the number of receivers and controllers according to the needs of the usage scenario.