An optional BTA-1 Bluetooth adapter lets you use the AR-48c Ring Controller wirelessly during live performances. Use the Ring for wireless control of all your MIDI instruments and devices connected to your computersamplers, synths, and drum machines, as well as MIDI-enabled effects processors. The BTA-1 can also be used with the LiveTrak L-20 and F6. It offers wireless control via a free iOS mobile app featuring most onboard functions, including Fader Levels and Modes, Scenes, and more. Communication at up to 10 meters is possible in an unobstructed indoor space with BTA-1 units.