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, it is possible to remotely control devices connected to RF433 relay receivers without WiFi or battery as long as the switch matches the receiver. In addition, the push button switch enables great convenience in your smart life. Multi-function Switch: one wall panel remote transmitter switch can control multiple RF433 relay receivers, and multiple wall panel remote transmitter switches can also control one RF relay receiver at the same time. Use the included double-sided tape to stick the switch on. < p>Attention: The RF433 relay receiver and the wall transmitter remote control switch must be used with the same type. So you cannot buy a separate receiver or switch or use the standalone wall panel transmitter to connect to another type of receiver.