This is the detail page for one of over 225 audio interfaces covered in The Computer Audio Interface Guide, which also lists where to buy this interface used.
2 ch analog in (mic/line on XLR/1/4" combo), 2 ch analog out (1/4"), powered via USB or internal 9 volt battery or optional external 12V power supply, 1/8" headphone out with volume control and micx control. Alternate manufacturer link.