Specifications:

Model: 3110KL-04W-B39-E51
Fan Size: 80mm x 80mm x 25mm
Speed: 2700 RPM
Airflow: 31.8 CFM
Noise: 28.0 dBA
Static Pressure: n/a
Bearing: 2 Ball Bearing with Special Designed IC Inside
Voltage: 12 V
Current: .10 Amp
Fan Life: 160,000 hours
Connector: 3-pin (4-pin adaptor included)
Fan Screws: 4 fan screws included

Description:

With a life expectancy of 160,000 hours, the Scythe Minebea NMB line of fans have one of the longest MTBF ratings we have seen.  Leave it to the folks over at Scythe to team up with NMB (Minebea Matsushita Corporation) to create a highly efficient fan that caters to everyone's needs: high-flow, low-noise, and long-life.  NMB, the maker of the Panaflo line of fans, has been long regarded as one of the premier fan manufactures in the world, and with the release of the Scythe Minebea NMB fans, their reputation can only improve with even more prestige.  These fans have been specifically designed with a special, silent IC to reduce the typical switching noise commonly associated with computer case fans. 

Features:

• Equipped with Genuine Minebea 2-Ball Bearing: Minebea Corporation is the world leading bearing manufacturer, which produces more than 150 million bearings/month, and its worldwide market share reaches 60%. Every component (including lubricating oil for bearings) inside the NMB-MAT fan is produced in-house to keep the highest quality and precision.
• Silent IC Inside: These case fans come with special designed IC for PC usage and this successfully reduces the typical switching noise from a case fan.
• Outstanding Long Life of 160000 Hours: With all in-house development and high quality parts used in this case fan, the MTTF (Mean Time To Failure) is up to 160,000 hours, which is beyond the limit of standard ball bearings in the market.