Product review (5 stars): This is a wonderful little piece of hardware
This is a wonderful little piece of hardware.  It accurately tracks current indoor humidity and temperature, as well as historical highs and lows.  Digital readouts are really easy to read and temps. are available in F or C.  The unit itself runs on a single AAA battery, takes up almost no space, and can be used freestanding on a shelf or attached to a fridge or other metal object by a magnet on the rear of the unit.  Great value!