The Blade 450 3D is not just an upgraded version of the Blade 400, it is virtually an entirely new R/C helicopter. So if you are confident in your flying ability and are ready to graduate from the Blade 400, then the Blade 450 3D is for you. Unlike other high performance R/C helicpters, the Blade 450 3D is ready to fly right out of the box. On the ready to fly (RTF) version, the Blade 450 3D comes with a pre-programmed DX6i remote control, 2200mAh 3S 11.1V 30C LiPo battery, and a charger. The bind-n-fly or BNF version does not include those three items. The Blade 450 3D boasts newly developed higher torque servos, aluminum head block, carbon fiber body, a 3 bearing main shaft, and many more features that make the Blade 450 3D super responsive and an absolute thrill to fly.