The M-AUDIO M-TRACK SOLO is a USB audio interface with XLR/line inputs. - Brand: M-AUDIO - Model: M-TRACK SOLO - Input Type: XLR/Line Input - Output Type: USB Output - Included Accessories: USB Cable I've decided to do a little decluttering of my audio equipment. I obtained this to perform stereo sound correction with a REQ (room equalizer). I used it for two or three months, and now that the adjustments are complete, I'm putting it up for sale. I will ship it in simple packaging, wrapping the box in bubble wrap. Thank you for looking.