Internal Kalman filter integrates dead reckoning position with external GPS, using NMEA0183 format. Whether with GPS or not, it can continuously positioning .,so it is called reliable GPS added device.

1.     Sensors include 3 commercial grade gyros, 3 accelerometers, 3 magnetometers, and barometric altimeter;

2.     Digital compass azimuth accuracy better than 1°,pressure vertical accuracy better than 1.5m;

3.     Built-in World Magnetic Model for accurate true direction anywhere (automatic declination);

4.     Low power consumption (<0.5 watt) and small size (2 x 2 x 0.5 inches) for man-portable applications;

5.     Often used for personnel tracking (fire, police), real-time navigation route, disaster relief, etc