Simple operation LED PC Computer Fan. The biggest feature of this product is silent, and the fan will not make any noise that makes you feel annoying. Product Description Size: 120×120×25mm Working voltage: 12V Rated power: 3.24W Speed: 1000±10%RPM Air volume: 33.2CFM Static Air Pressure: 0.67mm-H2O Fan noise: 18.4 Dba Product life: 40000h Fan interface: large 4PIN Bearing type: hydraulic bearing Product Features: Directly plug in 4PIN Molex power supply, and multiple fans can be connected in series.