EXDISPLAY Be Quiet Pure Wings 2 (bl045) 92mm 3-pin Case Fan - 4 Volt Initial Voltage Outstanding Reliability And Silent Cooling The Pure Wings 2 family fans are unique in their class, combining outstanding reliability, silent cooling, and a great price-for-performance ratio. It\'s impressive how much quiet technology the German engineering team has crammed into these fans at this amazing price. They are the ultimate reason to put well-known be quiet! silent cooling in your PC if you haven\'t already done so. The Pure Wings 2 92mm model combines all of the above essential features. It provides maximum cooling airflow and operating noise levels down to a silent 18. 6d B(A). The increased air pressure makes the fans especially recommended for use in air cooling setups Feature Details Practically Silent Operation Seven silence-optimized fan blades with high airflow capabilities reduce noise-generating turbulences while increasing air pressure Very quiet operation even at maximum speed, with noise of 18. 6d B(A) Product conception, design and quality control in Germany Perfect choice for Home and Office PCs, Gaming and Multimedia systems Especially recommended for use in air cooling setups High-quality rifle-bearing technology contributes to a very long lifespan of up to 80, 000 hours 3-year warranty General Specs Dimensions (L x W x D), (mm) 92 x 92 x 25 +Silent Wings- Fan speed @ 12V (rpm) 1900 Air flow @ 12V (cfm, m3/h) 33. 15; 56. 02 Air pressure @ 12V (mm H2O) 1.65 Noise level @ 12V (dB(A))18. 6 Mechanical spec Dimensions (L x W x D), (mm) 92 x 92 x 25 Bearing type Rifle Motor technology4-pole fan motor Weight incl. fixed cables (kg) 0.093 Push pin fixing- Screw fixing Cables & Connectors Connector3-Pin Cable length (mm) 460 Cable sleeve- Performance & Noise Fan speed @ 12V (rpm) 1900 Air flow @ 12V (cfm, m3/h) 33. 15; 56. 02 Air pressure @ 12V (mm H2O) 1,65 Noise level @ 12V (dB(A))18, 6 Lifespan (h / 25?C) 80. 000 Electrical specs Rated voltage DC (V) 12 Starting voltage DC (V) 5 Operating vo