UDI U830 2.4Ghz 4CH RC Quadcopter Aircraft Mini UFO Orange Udi u830. Certificate: led,fcc,emc,en62115,rtte,en71,rohs,astm,6p. 2. 4ghz mini 4 channel 6 axis hand sensor quadcopter with gyro stabilization with gravity sensor. Functions: 4ch with gyro,fly up and down,forwards,backwards, left, right side flying and spinning,auto hover,360-degree flip and stunts, and spins. Udi u830 rc quadcopter can follow the direction of the hand sensor controller.