The Pure Wings 2 120Mm Pwm High-Speed Fan Offers Excellent Be Quiet! Cooling In The Entry-Level Class. The Extremely High Air Pressure Makes It The Perfect Choice For Any System. Pure Wings 2 High-Speed Fans Offer The Highest Level Of Reliability And Excellent Cooling With A Nearly Unbeatable Price-Performance Ratio. Nine Air Flow Optimized Fan Blades To Reduce Noise-Causing Air Turbulence The Durable Rifle Bearing Provides An Operating Life Of 80, 000 Hours Even At Maximum Speed, The Fan Reaches Only 36. 9 Db (A) Product Concept, Design And Quality Control In Germany Three Years Manufacturer'S Air Flow Optimized Fan Blades For A Perfect Cooling. The Fan Blade Surfaces Are Optimized To Increase Airflow And Air Pressure While Reducing Noise-Causing Turbulence. The Recipe For Effective Cooling Of Pure Wings 2 Fans. The Pure Wings 2 120Mm High-Speed Fan Is At Maximum Capacity Only At 35. 9Db (A). Variable Fan Speed Volume And Fan Speed Can Be Controlled By The Pulse Width Modulation (Pwm) Via 4-Pin Fan Controller. No Matter If A Maximum Cooling Capacity Is Required Or Rather A Minimum Volume. Both Can Be Adjusted As Needed. Rifle Bearing Technology The Pure Wings 2 120Mm Pwm High-Speed Fan Stands For A Particularly Reliable Operation And Promises A Very Long Life Of Up To 80, 000 Hours. Technical Details Dimensions: 120Mm Revolutions At 100% Pwm / 12V (Rpm): 2000 Air Flow @ 100% Pwm / 12V (Cfm / M3 / H): 65. 51 / 111. 3 Air Pressure @ 100% Pwm / 12V (Mm H2O): 2. 23 Volume At 100% Pwm / 12V (Db (A)): 36. 9.