UPDATE. After only 5 months this thermometer stopped working, the display failed. I thought at first it might need a new battery, but replaced and it made no difference. I tested the new battery in another device and it is fine, so then I tested the original battery and that is charged too. So it is the thermometer that has failed. Do not buy.
Wow fast delivery, ordered at 11am and was at my door step the next morning. Thermometer works well, display is clear and easy to read.