Product overview: the SYMA x1 4-channel quad copter brings a new element to radio control helicoptersand a completely different experience of flying - balance, controland flips are a refreshing change and new process of learning to fly. 3D flips, stability and agility in flight simplify professional 3D maneuvers like pirouettes 3D fun flips , rollsand more. 2.4 Ghz radio control, with use of the newer 2.4Ghz technology, the SYMA x1 has the characteristics of longer control distance, strong anti-interference ability, small power consumptionand rapid response. 3-Axis, the latest 3-axis flight control system with adjustable gyro sensitivity that permits super stable flight. 3D full flight, various control options for those piloting the x1: up, down, left, right, forward, backward, leftward flight, rightward flight. Features: 3 way precision controller: up/down, left/right, forward/backward, speed up mode, 360° eversion, two fly mode: indoor/outdoor, built-in three axis gyro, removable battery - no battery restrictions if there are problems and more flight time with additional batteries. Includes: 1x 4CH 3-axis quadcopter, 1x 2.4G LCD remote, 1x 3.7V 350mah lipo battery (removable battery), 1x USB charger, 2x main blades A, 2x main blades B, 1x English manual. Specification: product battery: 3.7V/350mah li-po, charging time: about 40 minutes, flying time: about 5-6 minutes, controlling distance: about 40 meters, frequency: 2.4G, channel: 4 channels.