RC ERA A61 Airwolf 4CH 6-axis Gyro Optical Flow Positioning RC RTF Helicopter. RC ERA C123(EC135) 6CH 6-axis Gyro Optical Flow Positioning 3D RC Helicopter. RC ERA A60 4CH BELL 206 Helicopter 1/42 Optical Flow Positioning 2.4G 6Axis Gyro.
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