USB FANS 5V: 5V 120mm USB fans for cooling various electronics devices such as router modem desk computerPS3 ,it can reduce the components temp to prolong unit working life. SPECIFICATION: Rated Voltage: DC 5V ,Rated Current:0.4A, Speed:2000RPM(),Airflow:About 100CFM(). SPEED CONTROLLER: 120mm USB computer pc fans with speed controller, you can adjust the speed from high speed 2000RPM(100CFM) to get different airflow and noise level. DUSTPROOF FAN FILTER: Each 120mm USB fan with dustproof fan filter to keep your devices clean. color:As shown Material:Plastic + Metal size:12 x 12cm Package Contents: 1 x 120mm 5V USB Powered PC Router Fans Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.