Supergem are specializing in designing and manufacturing audio and video products for the industrial, main products including speaker driver for Audio and Video products, car speaker,Home threatre, Hi-Fispeaker system and multi media, speaker, flat panel speaker, rock speaker… You are welcome to make a visit to our website http://www.supergem.com.hk to know more info of our company, if some can merit your demand, please do not hesitate contact with me and send yr inquiry to us at yr convenient.