This is New Blue 2.4 GHz Airwolf RC Helicopter RTF. The Blue airwolf rc helicopter is a coaxial RTF model and has 4 channel radio. This rc helicopter is suitable for all level flyer, especially for beginner as entry level in 4 channel heli. This blue airwolf has about 16 in. main rotor blades diameter, makes this heli is one of stable in flying.