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ARC USB is supported on both Windows and macOS, so you don't need to install any drivers. It is compatible with all RME sound cards that use TotalMix, which in practice means all devices manufactured since 2001.
The Fireface UFX+ and UFX II also support direct connection of the ARC USB to its USB port (which is otherwise used for recording to USB storage), so the ARC USB can be used to control the UFX+ and UFX II in stand-alone mode without connecting to a computer.
The ARC USB is powered directly from the USB bus. When using conventional USB cables, lengths of up to 10 meters can be achieved, and when using active cables, the ARC USB can be operated up to more than 20 meters from the computer.