Wireless Remote Control: Control your electrical applications with the wall transmitter within the required range. No WiFi / battery to control: thanks to the self-generation function of the transmitter switch wall panel, you can remotely control devices connected to RF433 relay receivers without Wi-Fi or battery, as long as the switch matches the receiver. Besides, the rocker push button brings great convenience in your smart life. Multi-functional switch: one wall panel remote transmitter switch is able to control multiple RF433 relay receivers, and multiple wall panel remote transmitter switches can also control one RF relay receiver at the same time. double-sided adhesive included. Attention: The RF433 relay receiver and the wall panel transmitter remote control switch must be used with the same type. So you cannot buy a receiver or switch by itself or use the standalone wall panel transmitter to connect to another type of receiver.