... Specification Size 323 * 300 * 42MM Fan Size 200 * 200 * 20MM Air Flow 72CFM Fan Speed 650RPM Voltage 5V DC Power 1.5W ... the classic C-type design, unique appearanceTwo, 20CM large fan, air flow more open to your notebook computer to provide fast and ... efficient coolingThird, the open-type air intake, air intake volume, cooling effectFour, USB composite power supply interface ...