powerful fan but

The fan looks good, runs well and promoted enough air in my router.
As my wireless router is very very hot for whatever reason, I've been thinking it but a fan to miss to cool it at least a little bit so I sawed a hole in the router and drilled 4 holes hinen mounted screw cooler with the included and a 12V power source soldered. Looked better than expected and also cools very well so internet speed has improved yet quiet is all definitely not ok for this price is clear but partly but hear him very strong so I have the voltage to 11V and grants hears you almost nothing