Fractal Design Silent Series R3 fans offer excellent value for money, with good performance and assured reliability. Featuring rifle bearings, providing improved life expectancy and lower noise compared to a standard sleeve bearing Black stealth ribbon cable, making it easy to hide the cable contributing to a clean build Improved, more balanced, sturdy fan design delivering precision at a good price point Low fan speeds, optimized for quiet operation Featuring Fractal Design’s signature black and white color scheme Specification Type: 4cm Case Fan AMD/Intel: N/A Fan Connector(s): 3-pin Installation: Screws LED Lightin No Colour: Black & White LED Lightin - Weight: 19 g Fan Dimensions: 40 x x 40 x 10 mm Fan Controller: No Rotation Speed: 4000 rRPM Fan Bearin Rifle bearing Air Flow: 3.6 CFM Noise level: 20 dBA Power: Input power: 0.4 W Max input current: 0.05 A Input voltage: 12 V Starting voltage: 7 V MTBF: \"\"40,000 hours\"\" Package Contents: Silent Series R3 fan Screw pack with 4 metal fan screws Package Type: Retail Package Weight: 0.0490 kg Warranty: 2 Years