Esky&reg; Belt-CP 6 CHANNEL 2 CCPM Professional 3D Radio Remote Control Electric R/C Helicopter (WHITE) CCPM System.Auto-rotation System High Rigidity Alloy Tail Boom.High Strength Carbon Fiber Tail Boom Support Set Tail rotor Belt Drive System High Inertial Main Blade,High Rigidity Iron Main Shaft Shock Proof Iron Landing Skids.Full Ball Bearing and Metal Ball End