This is the remote-controlled helicopter that can be maneuvered by beginning flight enthusiasts through doorways and hallways indoors, and up to a range of 400' outdoors in calm conditions. Unlike other dual-rotor toy helicopters that simply hover, this one uses motors that generate twice the torque of other motors, and it has counter-rotating rotors that eliminate the destabilizing effects of angular momentum, a condition common to all traditional helicopters. It comes with a four-channel transmitter with proportional throttle and trim settings that allow it to be precisely controlled up and down, rotated in place left and right, pitched forward and backward, and rolled left and right. The durable aluminum rotor shaft is topped by a weighted flybar that provides additional stability, and the rotors may be tuned by adjusting the pushrods--unlike other helicopters that only have static rotor configuration. A training gear set is included for added stability and blade protection, and the copter has a flashing blue light for day or night flying. It can be flown for up to 12 minutes before its rechargeable battery requires a one-hour recharge. Transmitter requires eight AA batteries. Ages 14 and up. 6 1/2" H x 2 1/4" W x 14 1/2" L. (8 1/4 oz.)