Features: 1) 2 channel proportion radio control electric helicopter, helicopter size is 44 x 50 x 16cm 2) Includes 2 speed controllers for a main motor and a tail motor 3) Driving 2 servos, complete left/right, up/down control (throttle, aileron, elevator and rudder) 4) The helicopter (factory pre-assembled, zero assembly time) 5) Frequency: 27MHz 6) Suitable for indoors and outdoors. 7) Helicopter use 9.6V 650mAh nickel-hydrogen chargeable battery 8) Helicopter size: 480mm length, 225mm height, 450mm main rotor diameter 9) Color box: 66.10 x 15.20 x 25.20cm 10) About 10min flight time for each charge Outer packing: 6pcs/ctn Carton dimensions: 67 x 32 x 76cm Volume: 0.163cbm N.W.: 6.30kg G.W.: 8.50kg Conveyance: Qty/20\'\' FCL: 1,032pcs Qty/40\'\' HQ: 2,508pcs