... with a 12 cm fan for cooling Stunning audio quality Volume control, mute, on/off fan switch USB hub Cooling laptop with a big ... 12 cm fan and enhancing its sound quality with ... efficient Class D amplifier. SpecificationsButtons: Volume control, Mute, On/off fan switchDrivers: 1.5", 4ΩPower input: 5V over USBFan: 6CFM ...