140 mm ultra large fan, low noise, super cooling; Ultra thin design, is very portable, convenient to carry; High strength material application, is very stable. Apply to under 14 inch laptop heat dissipation. Rated voltage: DC 5 V. Operating voltage: DC 4.5 ~ 5 V ; Rated current: 0.13A. Input power: 0.65W. Maximum air volume: 47.35 CFM. Noise: 21dB.