Chinatera 4 Ports Wireless Remote Control Digital Remote Control Switch Lightswitch Fast and easy installation, not obstructed by walls, capable of connecting any loads. Remote controller and switch can be used simultaneously for ease and flexibility Suitable for home, office, offices, hotels, intelligent lighting, electrical wireless control system. Suitable for Small home appliance like crystal lamp, modern low-voltage lamp, absorb dome light, ceiling lamp, fluorescent lamp, energy-saving lamps, exhaust fan, etc. This product uses the microcomputer as the core circuit design, with internal digital encryption to ensure that the products of the technical, performance, reliability between users and to avoid jamming caused by the outside world, full remote control beyond the obstructions,product can according to the user's needs to increase the use of multiple wireless remote control transmitter,it will let you reap the product of modern radio technology and bring you high quality of life fun and charm. Press any one of the buttons A, B, C D on remote controller of switch,the corresponding light or socket is powered,another press will cut it off.Each channel can be used individually