Product review (2 stars): and will be returned for a warranty replacement (or better yet, a refund if Amazon will provide it)
I purchased two of these controls to complete remodels of two adjoining bathrooms.  I thought the original description noted that the humidity level was adjustable, but that could have been a mistake on my part (so not "dinging" the control for that).  What I don't care for is the lack of consistency between the two controls, and the general unpredictability for when the fan will turn on.  The first of these units was installed this autumn.  It turns on when the humidity tops about 65-70%, which is acceptable.  It often turns off, however, long before the room is cleared of moisture (even to the point that mirrors are fogged).  The other unit was installed last week, and will be returned for a warranty replacement (or better yet, a refund if Amazon will provide it).  It has turned on with humidity levels as low as 27%, and turned on four times two nights ago when the humidity level never reached 35%.  Clearly defective.  After trying two of these units, I will not purchase another.  We bought these to pair with our Panasonic fans, which I also find are no better than less expensive units we have owned.  These are likely the last items we will buy from Panasonic.  Not impressed with either the controls or, for that matter, their expensive fans.