Product review (5 stars): To switch or not to switch
Bought 2 switches for 2 baths.  The daughter child is a showerholic.  The water vapor was such a problem.  Not anymore.  The sensor automatically engages to move the vapor out of the room.  And it automatically turns off when the room is dry.  I recommend this for anybody that wants to shower without remembering to turn the exhaust fan on or off when the room is dry.  It is not really a 5 star product.  It is really a 6 star product all around.