Introducing the high quality quiet 12cm fan with patent pending FDB (Fluid Dynamic Bearing) technology. This "Fluid Dynamic Bearing" technology from SONY Corporation can provide a dramatic reduction in fan noise and prolong the life of your fan.

- 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 150,00 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#: SFF21D
Dimensions: 120x120x25mm
Fan Speed: 800rpm
Fan Noise: 8.7dBA
Air Flow: 33.5CFM
Rated Current: 0.10A

Connector: 3-pin (4-pin adaptor included)
Cable Length: 30cm
Bearing Type: S-FDB (Fluid Dynamic Bearing by SONY Corporation)

MTBF: 150,000 hours
* 150,000 hours of MTBF is measured under the 25C (77F) ambient temperature.
* MTBF of normal ball bearing Fan: 50,000 hours
* MTBF of normal sleeve bearing Fan: 20,000 hours

The following environment factors are advised for S-FLEX™ Quiet Fan.
Operating Temperature: -10C ~ 70C (14F ~ 158F)
Storing Temperature: -25C ~ 70C (-13F ~ 158F)
Avoid extreme humid environment and non condensing environment.