TAU2202B is a GNSS module with dead reckoning, which is based on Allystar CYNOSURE III SoC chip. It supports GPS, BDS, and QZSS satellite signals. Combining GNSS positioning and inertial navigation technology makes TAU2202B output positioining data in the environments where GNSS signal quality is poor or even loss (such as tunnels, underground parking, etc.), and provide continuous and accurate positioning for navigation applications.