Guangzhou BYZ digital technology Co., LTD. is an earlier domestic company for headphones and digital product research and development in China. The company has more than 1000 employees, the production capacity is about 3 to 4 million pcs per month. The company has two brands "BYZ" and "Tongzhiyin". Productions and sales of the company include mobile hands-free headsets, MP3 / MP4 headphones, universal headphones detector etc. More than 10 series, nearly fifty items, different product specifications and color design.