Shenzhen guoxinda technolgy Co., Ltd, is a high technolgy, specialized in DVR, CCTV cameras and MDVR. The company located in shenzhen baoan district 42. Main products incleding hard disk DVR, from 4channels to 32channels. More details information can visit our WEB with strong R&D, our cameras are better more than the market supplied. It from 420TVL to 650TVL. The quolity is good, excellent in the night, the nigt vision is really different with others. Our MDVR also sales good in foreign countrys, especially in America. Widely used in steam ships, buses, school buses, police cars and so on. Builed in DDNS, make remote access easier.