Product review (1 stars): Tiny
This is the smallest fan I have ever seen.  I have a cabinet humidor with a Hydra humidifier and thought this would work with it.  This thing is about the size of a fifty cent piece and does not plug into the large hydra.  Even if this did plug into the Hydra, there is no way it would move very much air inside a large humidor.  It was $9 with free shipping, so it is not worth returning as I would have to pay to ship it back to them.