ZIP archive of 1.32 MB for the Huawei G525-U00, the U00 suffix identifying a specific regional or carrier variant of the G525 phone. The name does not list the contents, which in packs this small are usually schematic or layout PDFs. Such material helps when tracing the power supply from battery connector to PMIC, locating test points and checking SIM, charging or display circuits. Make sure your handset really is the U00 variant, since other suffixes can use a different board, and confirm the PCB marking matches.
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 @tamirat_moobile. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.