Harness the Full Potential of Your RME Interface Although it's convenient to house your I/O in a rack, having tactile control over your interface really streamlines your workflow. That's why RME users need the ARC-USB. This remote control puts the essential actions and commands of your interface right at your fingertips. It's easy to use: simply plug it into a USB port and your TotalMix FX software will detect and communicate with it. UFX+ and UFX II users can connect the ARC-USB directly to their interface, which is great when using them in standalone mode. It's even bus-powered, so it only requires a single USB cable to work. Sweetwater engineers have found that the ARC-USB is a great way to harness the full potential of your RME audio interface.RME ARC-USB available functions: No Function Global Mute Global Solo Mute Group 1 to 4 Solo Group 1 to 4 Fader Group