Small 831 KB ZIP archive labelled SR-75x with version 1.1.1 and a 4+5+13 suffix, which likely refers to a set of included variants or parts, though the name does not explain it. The brand and exact device are not stated, so open the archive and read the file names and any notes to identify the target. Firmware of this kind is used to update or recover a device. Make sure it matches the hardware exactly and back up the current contents before writing anything.
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 .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip