1,A self-powered wireless switch that does not require a battery. In the absence of a battery or WiFi, you can tap the switch panel to convert the kinetic energy of finger pressure into electrical energy and send a 433 MHz wireless signal to the receiver to turn the lights on or off. 2. Easy to install, the switch panel does not require rewiring. Simply connect the receiver to the live and neutral wires of the desired light and tap the switch panel to control the light on and off. 3,A self-powered wireless switch with strong RF signals, which can transmit strong RF signals through walls and doors to control light fixtures within areas of about 50 meters indoors (150 meters outdoors). It is very suitable for controlling light fixtures in homes, garages, outdoor lighting, and gardens. (Cannot be installed inside a metal box because the metal will shield the signals and cannot be used!) 4, DIY your wireless light switch system, which can control one receiver with multiple switch panels,