Windows executable of DFTPRO version 5.0.0, a 140 MB installer associated with Xiaomi devices in the catalogue. The file name itself gives nothing beyond the tool name and version, so its exact functions should be checked before use. Service tools of this kind are used by phone technicians for flashing, unlocking or repair tasks over USB. Run it on a dedicated workstation, scan it with antivirus first, and keep the device drivers and a backup of the phone data ready.
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 @mrepairo. Enginerys does not host this file.