Detailed Description  1) NOR collective pitch structure make prefect 3D maneuvers such as roll,inverted,and swoop flights. 2) The autorotation landing system,made of high quality one-way bearing.maximally protects your helicopter from damage. 3) Tail blades driven by belt provide easy adjustment,stable flight,and low noise. 4) 380 motor as the main power is powerful and makes the flight much stable 5) Three-cell LiPo at 11.1V 1200mAh offers up to 6-7 minute flight 6)7-channel transmitter PCM701 with adjustable PIT parameter,throttle curve,and servo exponential function