Wireless Remote Control: Control your electrical devices with the wall-mounted transmitter within the required range. No WiFi or battery needed: thanks to the self-powered function of the transmitter switch panel, you can remotely control devices connected to RF433 relay receivers without Wi-Fi or batteries, as long as the switch is compatible with the receiver. The rocker push button design adds convenience to your daily life. Multi-functional switch: one wall-mounted transmitter can control multiple RF433 relay receivers, and multiple transmitters can also operate a single RF relay receiver simultaneously. Double-sided adhesive is included for easy installation. Note: The RF433 relay receiver and the wall-mounted transmitter switch must be of the same type. Do not use mismatched components or attempt to connect the transmitter to a different type of receiver.