Bearings - 3rd generation fluid dynamic bearings. 12DBA Fluid Dynamic Bearing Fan Smaller, domed motor hub, larger, more dramatic fan blade sweep area, no other fans on the market come even close in performance! There might be fans that offer more airflow or lower noise levels, but when it comes to a balance between the two, these fans can't be beat, now with Japanese fluid dynamic bearings and reduced vibration..
5, Black, 2 Speed Portable Fan, Powerful Offers Quiet Cooling, Tilting Base To Direct Airflow, Compact Folding Design Makes It Easy To Carry Store, Runs On 2 D Batteries Not Included.