Thermaltake’s Mobile Fan 12 is a convenient cooling solution for "Mobile user�. It is powered by USB and features a cable box to retract the USB cable. The 120mm fan moves up to 66 cubic feet per minute (CFM) of airflow - more than enough to prevent you from sweating. Bearing Type: Sleeve RPM: 800 ~ 1,500 RPM ± 250 RPM Air Flow: 66.55 CFM Noise Level: 19 ~ 33.5 dBA Power Connector: USB 1.1/2.0 Color: Orange Compatibility: Case Dimensions: 120 x 120 x 25 mm