UDI RC Nano U839 2.4GHz 3D RC Quadcopter, Remote Control Included, Orange This lightweight, easy-to-fly, nano-sized remote control quadcopter is one of the smallest radio controlled, full-featured multi-rotor drones in the world. It has all the features you need because it's optimized for fun. The tiny controller uses the same lithium polymer pack as the flight battery. That means you get almost twice the flight time, because you can swap the flight battery with the transmitter battery. Buzz this safe and tiny UFO around the yard or into the wild, then easily perform 360-degree rolls in any direction. The U839 is an exciting quadcopter to see in action and even more exciting to fly.