USB FANS 5V: 5V 120mm USB fans for cooling electronics devices such as router modem desk computer , it can reduce the components temp to extend unit life. SPECIFICATION: Rated Voltage: DC 5V, Rated Current: 0.4A, Speed: 2000RPM (Total), Air Flow: About 100CFM (Total). A variety of power supply methods meet the requirements. USB silent fan supports a variety of power supply methods, DIY is more casual and convenient: mobile power supply, mobile phone charger, computer USB interface, etc. DUSTPROOF FAN FILTER: Any 120mm USB fan with dustproof fan filter to keep your devices clean. Colour:black Material:plastic Size:24 x 12 x 5cm Package Contents: 1 x Cooling Fan for Router Only the above package content, other products are not included. Note: Light reflection 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.