1. A self-powered wireless switch that requires no batteries. In the absence of batteries or Wi-Fi, tapping the panel converts the kinetic energy of your finger into electrical energy and sends a 433 MHz wireless signal to the receiver to turn the lights on or off. 2. Easy to install, the panel requires no rewiring. Simply connect the receiver to the live and neutral wires of the desired light and tap the panel to turn the light on and off. The product code is identical to the factory code, avoiding any code confusion; so you can use it directly! 3. A self-powered wireless switch with strong RF signals, capable of transmitting strong RF signals through walls and doors to control lights within a range of approximately 50 meters indoors (150 meters outdoors). It is ideal for controlling lights 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,