Great 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, panels, etc. It can be controlled within 50 meters away 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 via the wireless switch. It is a standard 86 type switch. Easy to install The mini size of the receiver is 47*42*23mm. It is installed between the power supply and the device. It can be easily hidden in most electrical boxes or junction boxes, or can also use screws to fix it on the board. You can easily install it to control lights or socket. No wiring requirements. Multiplayer ControlEach receiver can store about 10 wireless switches. So you can share the switches with your family. You can all remotely control the device corresponding to the receiver. And one transmitter can also control multiple receivers. For example, 1 switch installed on the wall next to the bedroom door and another one placed on the bedside table. Quality Assurance High quality relay can be used more than 400,000 times . This receiver adopts a 10 amp relay, which can charge high-power electrical appliances. The receiver is suitable for AC 85V ~ 250V voltage, so AC 110V/220V/230V is OK. High quality switch The wireless switch can be clicked more than 500,000 times. 12V 27A battery is requested. And it can work for about 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 according to your needs.