ZIP archive of about 304 KB labelled with a date-like string 22-09-23-22 and the code HTM32Z165, which appears to be a model or board identifier, though the name gives no brand or file type. The size fits a small firmware dump or a compact document set. Extract it with 7-Zip or any unzip tool and check what is inside, then compare the identifier with the label or silkscreen on the device before using any image. If it turns out to be a flash dump, read and save the original chip contents first so the unit can be restored.
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 @biositechyangiyer. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.