With the new Vortex V2 you get a completely assembled and ready to fly micro helicopter with a coaxial counter-rotating head design that is so stable almost any first-time flyer can be hovering like a pro in no time. The Vortex V2 features counter-rotating main blades that take out the rotational torque that makes hovering a challenge in normal helicopter designs. The counter rotating design makes rudder turns much easier by slowing down one or the other blade without destabilizing the helicopter. These helicopters are super-easy to fly, even for beginner helicopter pilots. Perfect for flying in average sized living rooms. Everything you need to fly right out of the box is included except for 8 "AA" sized batteries for the transmitter. # Includes: Completely assembled helicopter with motors and rotor blades # Already installed 4-in-1 negative-shift receiver with mixer, speed control and gyro # Two pre-installed servos # 7.4V 800mAh Li-Poly Battery with balancing taps # Charger and AC adapter # 4 Channel Transmitter # Illustrated Instruction booklet Main Rotor Diameter: 13.5 in / 345mm Length: 16.9 in / 430mm All-up-weight: 8.6 / 245 g Power: 7.4V Lipo 800mAh Motor Type: Dual 180 Motors Transmitter: 4 Channel Body Color: Yellow