Scythe S-FLEXTM 80 mm Case Fan S-FLEX SFF80D (2,800 rpm) S-FLEX Fan Series is equipped with Sony S-FDB Bearing which promises lowest noise level at highest quality and lifetime (150,000 hours). Equipped with Genuine S-FDB Bearing This fan is equipped with genuine S-FDB (SONY Fluid Dynamic Bearing) made by SONY corporation. Market Leading Low-Noise Level S-FDB technology drastically eliminates the friction between the bearing and the shaft which makes this fan nearly inaudible to human ears. Additional suction magnet optimizes the magnetic force balance within the rotor to achieve the absolute silence. To further achieve the absolute silence, the fan is equipped with the Linear drive IC for reducing electromagnetic noise. Outstanding Long Life of 150,000 Hours Patent Pending "S-FDB" structure allows the fan to last up to 150,000 hours. Anti-Shock Ability Conventional ball bearing carries a point contacting structure for the rotation, which gives point supporting situations at dropping impact to damage ball bearing surface which could cause irregular noises. The S-FDB carries a surface contact mechanism for improved anti-shock structure, which is 5 times stronger than the conventional ball bearing. Model Name: S-FLEXTM 80 mm Gehäuselüfter Model Number: S-FLEX SFF80C (2,000 rpm) Dimensions: 80 x 80 x 25 mm | 3.14 x 3.14 x 0.98 inch Specifications: 2,800 rpm Version: 40.2 CFM = 68 m³/h | 32.4 dBA | DC 12 V | 0.20 A Connector: 3-pin (4-pin adaptor included) Bearing Type: S-FDB (Fluid Dynamic Bearing by SONY Corporation) MTBF: 150,000 hours Weight: 80 g | 2.82 oz S-FLEXTM is a registered trademark of SONY Corporation