In perfect condition, never used but open box item.   No box, no manual, no cables.

Rapco product info:

 The SC100i is an isolated signal combiner that will let you combine two signals into one XLR feed. For example it will let you combine drum or choir mics into one XLR output. This saves channels on you mixing board and lets you give both sources identical signal processing treatment while giving you one slider control of their volume.
Features
    Heavy-duty steel box
    Neutrik XLRs
    High quality 1:1 insolation transformer
    Combine 2 XLR mic inputs into a single XLR output