YWZ is the professional earphone barand owned by Guangzhou sonic sound Sci--Tech co.,Ltd.--an original developer of China metal super--bass earphonesBased on the ten years' R&D experiece in Hi-Fi earphones before the company establishiment ,Sonic Sound integrates R&D,desingning,production and sales in order to provide earphones with top,quality,high performance and fashionable personalities,aswell as Bluetooth,other consumers electronic products and services to customers from all over the world. Our products are widely recongnized and trusted by our customevs,and we take great pleasure in meeting the development and demands of society.1.Innovation:Professional R&D Team--OEM and ODM welcomed.2.Quality Guaranteed:Strict QC system--ALL procedures and transportation under control.3.Good Reputation:12 years of experience in world wide cust omers for OEM and ODM.