GREAT PLANES REALFLIGHT G5.5 UPGRADE FROM 3.0- 4.5 VERSIONS You don't have to buy a whole new RealFlight to enjoy the advantages of G5.5! Add RealFlight's latest advances to your G3, G3.5, G4 or G4.5 simulator*! *InterLink® Controller not included Choose from over 80 aircraft and more than 30 flying sites. Fly with multiple pilots. Face off in new DeadRinger™ and Hardcore Combat events! New aero tow and bungee launch options for gliders. New flying sites with Enhanced Graphics — and more! RealFlight G5.5 Upgrade uses the Futaba®-style controller that came with your older version of compatible RealFlight software. After the upgrade, you'll enjoy the same familiar, unchanged controller functions that you always have. Note: QuickSelect™ and digital trims are not available with the G3 and G3.5 InterLink Plus Controller.