Zhongshan KOQI Electronics Manufactory has been a leading supplier specialized in the design and manufacturing of residential lighting, PIR sensor switch, digital subsection switch, remote controller, remote control switch, remote control socket, remote control wall switch, remote control lamp bases, remote control light multiplex switch, and electronic dimmer, electronic transformer, wireless door chime, wireless doorbell for more than 15 years. Brands, "KEDSUM" and "KOQI", are well known and ...