větrák Coolermaster Blade Master 92x92, sleave bearing, 17dBA, PWM function ell-balanced cooling performance among fan airflow, air pressure and noise. Wide PWM fan speed range between 800 - 2800 R.P.M. Anti-vibration rubber pads around the edges to decrease noise. Distinguished blade shape for airflow improvement. Specifications Dimension 92 x 92 x 25 mm Speed (R.P.M.) 800 - 2800 R.P.M. Air Flow (CFM) 15.7 - 54.8 CFM Air pressure (mmH2O) 0.35 - 4.27 mm H2O Noise 17 - 35 dBA Bearing Type Long Life Sleeve Fan Life Expectancy 40,000 Hours Voltage 12 V Current (Ampere) 0.26A Max. Power consumption 3.12W Max. Weight 91 g Connector 4 Pin Screws 4 pcs Rubber 4 pcs http://www.coolermaster.com/product.php?product_id=6621