USB FANS 5V 5V 120mm USB fans for cooling various electronic devices such as router modem desktop computer PS3, it can reduce component temperature to etend the life of the device. SPECIFICATION Rated Voltage DC 5V, Rated Current 0.4A, Speed 2000RPM, Airflow About 100CFM. SPEED CONTROLLER 120mm Dual USB Computer Fans with speed controller, you can adjust the speed from high speed 2000RPM100CFM to get different airflow and noise level. DUST PROOF FAN FILTER Each 120mm USB fan with dust proof fan filter to keep your devices clean. Color As shown Material Plastic Metal Size 12 12cm Package Contents 1 Dual 120mm 5V USB Powered PC Router Fans Only the above package contents, other products are not included. Note Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is 13cm.