HobbyEagle A3-L Aeroplane RC Flight Controller Stabilizer System 3-axle Stabilizer Gyro for RC Airplane Fixed-wing Copter Video Tutorial: http://v.youku.com/v_show/id_XNzQ2MTgzNjU2.html Futaba S.Bus / S.Bus 2 Supported. Adaptive Intelligent Attitude Algorithm is Used To Get The Best Performance. Easy To Use, Extremely Well-Suited To Beginners. HV (7.4) Operating Voltage Supported.