Shanghai 21ST Century Electronic Equipment Co.,Ltd is one of the leading China headphone, detector, metal detector, handheld scanner, security metal detector manufacturers and factory, welcome to wholesale and buy cheap 2016 headphone from us, and chekc products price with us. Our quality management system is approved by ISO-9001. All of our products are certified by CE, RTTE, FCC , EMC, UL, ROHS. Believing in integrity highest , quality first, we have been developing more and more new products sold to over 40 countries and regions including USA,EU and Australia. We are the most trusted supplier of many famous companies in the world. The first class quality is the best trade mark. Our future permanent advantage is learning more and faster than others.We'll supply newest and excellent products to all of our customers and make mutual brilliant progress together with them.