Braha iCon Fly X9- Smartphone Control Quad Copter USE YOUR SMARTPHONE OR TABLET: These can be controlled by either Apple or Android devices; simply download the free app and you're ready to launch ZIP, ZOOM, DIP, FLIP: This acrobatic copter has 6 flying tricks and the ability to flip 360 degrees. An ultrasonic sensor won't let it fly too high so you won't lose it SIMPLE CONTROLS: One key takeoff, landing and emergency stop and just two other touch controls make flying easy to master and maintain One key taking off, landing and emergency stop. Ultrasonic sensor to control the altitude DIMENSIONS: 7.7 inches across