Two 80 mm fan design, large airflow, low noise, super cooling; High strength material application. Anti-skid design. Apply to under 15.4 inch laptop heat dissipation. Rated voltage: DC 5 V. Operating voltage: DC 4.5 ~ 5 V ; Rated current: 0.25 A. Input power: 1.8W. Maximum air volume: 85CFM. Noise: 35dB.