The Garmin GMC 507 is the mode controller for your GFC 500 package. Its compact size and mark-width design require only minimal space in your avionics stack while providing easy access to all autopilot modes and functions. You can select advanced lateral and vertical modes such as pitch hold, altitude preselect, altitude hold, vertical speed and indicated airspeed hold as well as roll, track and selected heading. An intuitive control wheel integrated into the GMC 507 allows for easy and precise pitch, vertical speed and airspeed adjustments, while separate knobs allow quick twist control of heading and altitude. For added safety, a dedicated LVL button on the controller lets you command the autopilot to automatically return your aircraft to straight-and-level flight — and thus help avert a potential loss-of-control situation.