Rolls MB15B Promatch - 2 Way RCA to / from XLR +4 to -10 Line ConverterThe MB15 ProMatch converts consumer level stereo RCA signals to balanced XLR professional line level, and back. One side of the unit, labeled 1, has two XLR inputs and stereo RCA outputs. The other side labeled 2, has stereo RCA inputs and two XLR outputs. FEATURES: Stereo Direct Box Stereo RCA to stereo XLR Stereo Level control for each channel Works as stereo balanced line level control 1 8" Headphone level to line level adaptor Each side has stereo