This is definitely the worst thermometer I have ever owned. The contrast on the screen is not properly set (nor can you adjust it, at least I have not found any way to do it and it's not mentioned in the manual), so it always looks faint unless viewed at a 45 degree angle. Despite being named "PreciseTemp", it's temperature reading capabilities are abysmal. The indoor thermometer is currently 6 degrees over the actual temperature, and the outdoor is 4 degrees under. This is not a random occurrence, although how far off they are and in which direction doesn't seem to have any logic to it at all.
The only reason I have given this unit 2 stars only because of the clock. It seems to sync up without too much issue and the time zone is easy to change.
Bottom line, save your money and just buy one of the SkyScan atomic clocks. They are much more reliable, and I find the temperature to be spot on most of the time.