12-channel analog mixer with XLR, phone, and RCA input terminals (flexible configuration from 6 mono/2 stereo to 4 mono/4 stereo). - Brand: Yamaha - Model: MW12C - Number of channels: 12 - Input terminals: XLR, TS, RCA - Output terminals: TRS, RCA, XLR - Accessories: AC adapter (PA-10) Thank you for viewing. USB operation has not been tested. I believe there are no other operational issues (no scratchiness felt in pots or faders. Push switches may make a slight rustling sound when turned ON/OFF). Returns and refunds will be accepted in case of initial operational defects. If you are interested in the above, please consider purchasing.