The X1 Series from Bynav is a GNSS/INS combined navigation system that optimally combines a GNSS high-precision board with a tactical-grade IMU, available in X1-6, X1-5, and X1-3 models. It supports dual-antenna high-precision positioning and heading, deeply coupled GNSS plus IMU navigation engine, all-constellation multi-frequency RTK supporting BDS-3 and Galileo, and up to 320 channels. It provides centimeter-level position, velocity, acceleration, and 3D orientation with low latency, and features flexible interfaces including EVENT and 1PPS to synchronize external sensors such as LiDAR, cameras, and odometers, plus CAN protocol support under J1939 and NMEA2000.