GARTT GarttGT500 DFC RC Helicopter Torque Tube Version Super Combo Fits Align Trex 500 Helicopter Fits Align Trex 500 perfectly the DFC500 is an exciting helicopter to see in action and even more exciting to fly.Its 2024 alloy head ensures hard core 3D pilots won't be dissapointed in the performance and the beautifully painted cowl and Titanium anodized components make this a visually stunning helicopterwith performance to back it up Also featuring a DFC rotor head and torque-tube driven tail,this machine is capable of handling whatever hardcore aerobatics you choose to throw at it! need to assemble by yourself with electronic manual.