1. Sensors have temperature compensation and axis alignment calibration
2. Auto self-calibrate its attitude when the first time fixed and power on.
3. Time synchronization between GNSS and DR.
4. DR error is only 6m/km (0.6%) of 4.9km distance traveled.
5. Provide true 3D navigation data with/without GNSS signals.
6. 3 years warranty
7. The highest C/P value of car DR navigation module.