RAR archive of about 358 KB labelled with the ASUS Rampage IV Gene motherboard name. Nothing else is stated in the name, so the exact document type and board revision are unknown until it is opened with 7-Zip or WinRAR. Repair collections usually carry boardview or schematic files under such names, which let a technician find parts, follow power rails, check standby voltages and locate shorts on the micro-ATX board. Before trusting any reference, compare the revision inside with the one silkscreened on the PCB.
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.