RAR archive for the H97-PRO motherboard built around the Intel H97 chipset, about 289 KB. Only the model appears in the name, with no revision or document type, so the contents are unknown until extracted, but the size suits a boardview or schematic rather than a BIOS image. Repair technicians use such files to map components, follow signals from the PCH to connectors and check rails for shorts. Make sure the revision marked on the PCB matches, since separate revisions can move or change parts.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @boardview. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.