The UDI U818A HD has the Headless/IOC function. Usually, the forward direction of a flying multi-rotor is the same as the nose direction. By using Headless/IOC, the forward direction has nothing to do with nose direction. This lessens the steepness of the learning curve and allows the pilot to enjoy flight while slowly learning each specific orientation of the quadcopter. 6 AXIS GYRO - Equipped with the latest 6-axis flight control systems, 3D lock, More scheduled flight, operating more to the force! 360° Eversion - One key 360°roll,continuous roll for perfect action and wonderful performance

Fully Equipped: Extra 4 batteries & replacement spare parts(motors, blades, gears) included, providing better quality guarantee, while enabling you to enjoy longer flying time. Handy to Carry: The professional grade carrying case makes it more convenient wherever you go, and gives your drone and spare parts all-round protection. Stepless-speed function: Exclusively designed for both proficient and beginner. It can achieve seamless speed shift between 10%-100%, and the adjustment on speed can be 1%, which not only enables you to fly indoors & outdoors, but makes it easier to practice operating skills to move from beginner to expert quickly.