Product review (3 stars): difficult instructions
The instruction sheet for the LCD Display meter is in incredibly small type;  plus, they are not clear at all.  If you want to change the temperature reading from celcius to farenheit, the method is stated on another part of the gismo,

Fortunately, the thing I want is the temperature reading, and it comes large enough to read from across the room. The fact that I cannot find a way to get the correct reading for the time of day becomes irrelevant.