Main rotor diameter 340mm (13-3/8"), fuselage length 435mm (17-1/8"), flying weight 230g (8-1/4 oz.). Twister comes with a 4 Channel 72 MHz FM R/C Transmitter, 7.4V 2-cell 800 mAh lipo battery, lipo battery balance charger, piezo electronic gyro stabilization, 2 extra sets of main rotor blades, and an instructional flight training DVD. Flight duration is 10-15 minutes per charge. Whether you prefer the famous orange and white colors of the Army's full size helicopter or the camouflage of the Australian Army's Army, you can't go wrong with these easy to fly, flight-tested co-axial helicopters. From the authentic oleo landing gear detail to the canted 4-blade tail rotor, these beautifully crafted scale masterpieces look so realistic in flight that you can almost feel the 'whump' of the rotor blades and smell the exhaust haze! Both helicopters are completely suited to people with no RC flying experience.