I don't know what exactly you are looking for, but there is (a little) more information on the manufacturer's page:
https://www.nzxt.com/products...
You can find it under "Specification":
FN V2 140 (Case Version)
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Speed: 1,000 RPM
Airflow: 50 CFM
Noise: 21 dBA
FN V2 120 (Case Version)
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Speed: 1,200 RPM
Airflow: 45 CFM
Noise: 21 dBA
