The 2.4GHz New Generation Radio System is the standard of new generation radio system. It offers longer transmission distance, less interference, more stable radio transmission and less legal issue. For traditional radio frequency, helicopters in same frequency cannot fly together because of interference. With 2.4GHz radio system, many helicopters can fly at the same time without interference.
Mind-controlled quadrotor drone
Mind controlled drones are a hot area for researchers at Zhejiang University in Hangzou, China, who have adapted a Parrot AR Drone 2.0 to be operated by an Emotiv EPOC electroencephalogram (EEG) headset hooked up to a PC running custom software. By thinking "left" strongly, the mind-pilot can make the drone take off; thinking "left," "right," and "push," makes it turn clockwise, move forward, and fly up, respectively. More interestingly, clenching teeth makes the drone descend, while blinking commands it to take a photo. Check out the video below for a demo flight.