Product review (5 stars): It has done an extremely good job for us!
This product has proven itself to be very helpful accurate.  The display is very clear and easy to read. It is battery-operated and shows in either Celsius and Fahrenheit.  This does what it is supposed to do . We have one room that is always a little cooler in the winter and warmer in the summer and I purchased it mainly to try to measure and control the humidity and temperature in the room.