The Silent Wings 4 120mm PWM high-speed case fan is designed for maximum performance and silent operation. Featuring optimized fan blades and a funnel-shaped fan frame, this fan delivers high air pressure and airflow while remaining virtually inaudible. With a 6-pole fan motor and fluid-dynamic bearing, it operates smoothly and with less vibration. The anti-vibration mounting with push pins and screwed installation option ensures easy installation, while the super-long lifespan of up to 300,000 hours guarantees reliable performance for years to come.Specifications. Color Black. Cooler Type Case Fan. Bearing Type Fluid Dynamic Bearings (FDB). Connectors 4-Pin. Fan Size 120 mm. Fan Thickness . Fan Speed 2500 rpm. Static Pressure 3.96 mm H2O. Noise Level 31.2 dBA. Maximum Airflow 76.7 CFM. Power Consumption 2.4 W. Control Method PWM (Pulse Width Modulation). Weight 0.77 lbsFeatures. Silent Wings 4 120mm PWM high-speed combines all features of a virtually inaudible with an extremely performant fan for the most demanding applications. Optimized fan blades for the highest performance on radiators and heat sinks. Small tip clearance and a fan frame with funnel-shaped air outlets for extremely high air pressure. Very silent operation even at maximum speed. 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations. Anti-vibration mounting with push pins and screwed installation option. Super-long lifespan of up to 300,000h. Elegant look with high-grade fan sticker in an all-black design