1: Build in OSD.
2: Auto return home.
3: 5V/12V DCDC.
4: GPSINS Stabilizer.
5: 50Hz controlloop.
6: 3 Axis Gyro,3 Axis Acc.
7: Compass/10Hz GPS.
8: Build in Barometer.
9: AAT Support.

The new generation of OSD with GPS/INS
Easy / Simple / Professional

Dianmu connection diagram