Model name: BE QUIET! SILENT WINGS PRO 4 PWM

Legendary silence, epic performance and features

Silent Wings Pro 4 120mm PWM White is the most progressive, performant and versatile fan by be quiet!

• Optimized fan blades for the highest performance on radiators and heat sinks
• Speed switch allows changing maximum PWM speed between medium-speed, high-speed and ultra-high-speed (up to 3000 rpm)
• Small tip clearance and a fan frame with a funnel-shaped air outlet for extremely high air pressure
• Virtually inaudible operation at regular speed
• 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations
• Individual mounting systems for use as a case fan or with a radiator