Model No. : GNB 008-1 Specification: Dimension: 250(L) x 295(W) x 45(H) mm Fan Dimensions: 60 x 60 x 15 mm Fans Speed: 1500 R.P.M. í+ 10 % Fan Airflow: 30.5 CFM í+ 10 % Fan Noies Level: 26 dBA Bearing Type: Sleeve Rated Voltage: DC 5V All Crystal Design. Two Blue or Color Light Fans Directly Connect Power from USB Port of N/B