The Scythe S-FLEX 120mm SFF21F Fan is equipped with genuine S-FDB (SONY Fluid Dynamic Bearing) made by SONY corporation. S-FDB technology drastically eliminates the friction between the bearing and the shaft which makes this fan nearly inaudible to human ears. The 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 a Linear drive IC for reducing electromagnetic noise. The "S-FDB" structure allows the fan to last up to 150000 hours. The S-FDB carries a surface contact mechanism for improved anti-shock structure, which is 5 times stronger than the conventional ball bearing.

This 120mm fan has a noise level of 28dBA at 1600RPM with an air flow of 63.7CFM. The fan is 120mm x 120mm x 25mm with a 3-pin connector and a 30cm cable. The advised environmental factors for this fan are -10C~70C (Operating Temperature), -25C~70C (Storing Temperature). It is also advised that u you avoid an extremely humid environment.