YXZNRC EC135 6CH Gyro 2.4G Flybarless Optical Flow Altitude Hold RC Helicopter. YXZNRC F06 EC135 Aircraft 3D 2.4G 6CH 6-Axis Gyro RTF Flybarless RC Helicopter. RC ERA C138 Bell-206 RC Helicopter 1/33 3D 6CH Gyro Optical Flow Altitude Hold.
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