Fan dimensions: 70 x 70 x 11 mm (2.75 x 2.75 x 0.4 in. Pad dimensions: 305 x 320 x 40 mm (12 x 12.6 x 1.5 in.) Air flow: 12 cfm Fan speed: 1600 rpm Fan noise: System requirements: PC or Mac notebook computer with USB port Package contents: Notebook Computer Cooling Stand Reference guide