This new Esky KOB Eagle is completely assembled and ready to fly micro heli 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 KOB Eagle offers things other similarly designed micro helis can?t ? the power and precision of ESKY 8g servos, an advanced 4-in-1 controller, and a great looking, lightweight body that really stands out. The KOB Eagle features counter-rotating main blades that cancel out the rotational torque that makes hovering a challenge in conventional helis.They also make rudder turns much easier by slowing down one or the other blade without affecting the stability of the aircraft. This is truly a helicopter that most anyone can fly and beyond your dream. Finally, 2.4 Gigahertz equipment use less current to operate than standard frequency systems. This results in longer flight time and longer life of your transmitter and receiver batteries!