Firmware for an S500 satellite receiver, version 1.1.80 dated 07.03.17, packed as a 4.58 MB RAR. The name does not state the brand, but it matches the HD BOX S500 1.1.92 package of the same size, which suggests the same product line. Use it to update or recover a receiver after a failed upgrade, by USB or serial loader. Check that the main board and model match before flashing, and back up the existing image, since S500-named boxes from different makers can use different hardware.
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 @tvsoftwareworld. 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.