Correct product, but unusable attachments

The instructions contained in two images, but be prepared to spend a good evening assembly. Or, grab bolts (long) and adapted nuts, and throw directly rubber fixings provided in the trash.
They do not pass through the standard holes in the chassis, and then pulling it like a brute, and then they break. That is why they provide more, but they should have expected a whole case.

Otherwise, the fan is rather quiet. The silence of sensation is especially sensitive after the half hour you have spent bawling curses.