We are a professional manufacturer of digital compass, inclinometer, digital tacho&hour meter in Shanghai. The main field is GPS terminal, GPS automobile independent navigation, vehicle satellite communication, satellite cable TV rebroadcast. Transmission in Movement technology, the orientation of radar antenna, vehicle radio direction finding, remote sensing and telemetry, ship navigation, the navigation of pilotless aircraft and aerobat, hydrospace detection, test control of minerals and drilling for oil, etc;