Product review (1 stars): I hate it. It works OK when it works
I hate it.  It works OK when it works, BUT it should have come with a 5 year supply of batteries.  The (getting expensive now) battery replacement makes consider tossing the unit into the trash.  I use it in a music room with 4 other (each a different brand) digital hygrometers and a wick hygrometer (slightly fanatic).  The others are not as battery-savage as this one, using one battery for every 3 or 4 used by this one.