Wireless Remote Control: Control your electrical appliances with the wall transmitter within the required range. No WiFi/Battery for Control: With the self-generating function of the wall panel transmitter switch, you can remotely control devices connected to the RF433 relay receivers without WiFi or battery, as long as the switch matches the receiver. In addition, the push button provides great convenience in your smart life. Multifunctional 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 simultaneously. Attach the switch with the included double-sided tape. Please note: The RF433 relay receiver and the wall panel transmitter remote control must be used with the same type. So you cannot buy a receiver or switch separately or use the standalone wall panel transmitter to connect to another type of receiver.