Fantastic Design: RF 433Mhz wireless light switch. No wiring needed between lights and switch. Stable and reliable performance with high reception sensitivity (> -97dBm). Radio frequency signal transmission. A strong signal can pass through walls, floors, doors, and panels. It can be controlled within 50 meters in an open space. Easy to Use: The wireless switch can be fixed with double-sided tape or screws. You can turn the device on/off from anywhere using the wireless switch. It's a standard 86-type switch. Easy to Install: The receiver's mini size is 47*42*23mm. It installs between the power supply and the device. It can be easily hidden in most electrical boxes or junction boxes, or attached to a board with screws. You can easily install it to control lights or outlets. No wiring required. Multi-User Control: Each receiver can store approximately 10 wireless switches, allowing you to share switches with your family. Everyone can remotely control the device associated with the receiver. A single transmitter can also control multiple receivers. For example, one switch installed by the bedroom door and another placed on the nightstand. Quality Guarantee: High-quality relay can be used over 400,000 times. This receiver uses a 10 amp relay, capable of powering high-performance electrical appliances. The receiver is suitable for AC 85V~250V voltage, so AC 110V/220V/230V is compatible. High-Quality Switch: The wireless switch can be clicked over 500,000 times. Requires a 12V 27A battery and can operate for approximately 5 years. The battery can be replaced after disassembly. More Flexibility: Extremely easy to configure and reset. You can easily add additional wireless switches yourself as needed.