USB FAN 5V: 5V 120mm fan for cooling various electronics devices such as router modem desk computerPS3 PS4 Xbox ,it can reduce the components temp to prolong unit working life.SPECIFICATION: Rated Voltage: 5V ,Rated Current:0.25A, Speed:(1100RPM-1500RPM),NoiseLevel:(20dBA-36dBA),Airflow:(25CFM-45CFM).3 SPEED CONTROLLER: 120mm fan with speed controller, you can adjust the speed from high speed 1500RPM(45CFM) , medium speed 1300RPM (35CFM), low speed 1100RPM(25CFM)to get different airflow and noise level.DUSTPROOF FAN FILTER:120mm USB fan with dustproof fan filter to keep your devices clean.