[. . . ] [. . . ] The fan speed is automatically adjusted according to the surrounding temperature ­ the hotter the area, the higher the fan speed and vice versa. Available in 80mm, 90mm and 120mm, the ARCTIC F TC fans are offering high performance at relatively low fan speed. Voltage: Bearing: 6 - 12V Fluid Dynamic Bearing Fluid Dynamic Bearing Impeller Sealing Steel shaft Dimensions: Fan Speed: Air Flow: Noise Level: Weight: 80 L x 80 W x 25 H (mm) 500 - 2, 000 RPM 28 CFM / 47. 6 m3/h 0. 01 - 0. 3 Sone 72g High precision Japan made bearing Lubicant Especially hartdened steel plate for low friction Dimensions: Fan Speed: Air Flow: Noise Level: Weight: 92 L x 92 W x 25 H (mm) 400 - 1, 800 RPM 35 CFM / 59. 5 m3/h 0. 04 - 0. 4 Sone 84g Dimensions: Fan Speed: Air Flow: Noise Level: Weight: Patents: 120 L x 120 W x 25 H (mm) 300 - 1, 350 RPM 57 CFM / 96. 8 m3/h 0. 04 - 0. 5 Sone 110g DE 20307981, DE 202005011514, US 7101149, CN 200610106209 [. . . ] [. . . ]