Shenzhen Biyang Tongda Technology Co.,ltd,is the hi-tech enterprise which established in 2006 based in Shenzhen???????????????angong,China,with a factory area of 2000 square meters,which is located in the ShiJiaoTou Industry,Baoan Area which named the ???????????????ck Garden???????????????or Shenzhen.We devote to researching, developing,producing and marketing HD player,GPS Navigator,Li-ion Battery,and Plymer Battery.We have excellent R&D team and QC Department. We research and develop over than 5 new models per month. Our ...