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.</br>6 AXIS GYRO - Equipped with the latest 6-axis flight control systems 3D lock More scheduled flight operating more to the force!</br>360? Eversion - One key 360?rollcontinuous roll for perfect action and wonderful performance</br>HD Video Camera - U818A HD equipped with 2MP HD video camera (Resolution: 1280 x 720; Framerate: 30 Fps) lets you control the aircraft Enjoy taking pictures/video of the pleasure flights.</br>Upgraded Accessories - Extend your play time with two LiPO Battery and a upgraded 4GB Micro SD memory card.</br></br>Product Description</br></br>6 AXIS GYRO <br> Equipped with the latest 6-axis flight control systems 3D lock More scheduled flight operating more to the force! <br> <br> 360?? Eversion <br> One key 360??roll??continuous roll for perfect action and wonderful performance <br> <br> HD Video Camera <br> U818A HD equipped with 2MP HD video camera (Resolution: 1280 x 720; Framerate: 30 Fps)?? lets you control the aircraft Enjoy taking pictures/video of the pleasure flights. <br> <br> Blade Protector <br> Highly elastic plastic protective circle?? preventing the blades in flight Cause wear?? anti-collision anti-fall performance further enhanced! <br> <br> Upgra