The Kama Flow 2 fan series from Scythe features their new Extra Fluid Dynamic Bearing (EX-FDB) design. This design features a group of V-shaped grooves to achieve micron level thickness oil lubrication and prevent leakage by controlling high pressure fluid motion. With its high quality and long lifespan rating, the Kama Flow 2 is an excellent fan at a great price. *** Specifications: Fan Speed: 1900 RPM, Noise Level: 33.8 dBA, Airflow: 63.23 CFM, Rated Voltage: 12V, Weight: 169 grams, Bearing Type: EX-FDB, MTBF: 120,000 hours @ 30°C, Connector: 3-Pin (4-Pin adapter included) ***