You are purchasing the shown Garmin GAD-29B Compact GPS/Navigation Data Interface Adapter w/Autopilot Interface. This unit was removed in good working condition for avionics upgrade and comes with a 30 day guarantee.

With the GAD 29B, the G5 H.S.I. can drive heading and course error out to third party Century, Cessna/ARC, Honeywell/Bendix King, an S-TEC autopilots.