We have a Fan-Tastic fan in our RV bathroom and this is either another company or simply JUNK.  Yes, it blows air but even on the very lowest setting but it is LOUD.  To compare, we have an inexpensive ($15?) Honeywell Turbo fan that is 1/2 the noise on its highest setting!  May keep it for a dire emergency but I think we are going to look for another option (maybe a converter so our batteries can run the Honeywell fan if we do not have shore power).  This is tops a $15 fan and miserable to be around.