Product review (4 stars): Precise but not Accurate
Cycling between the mist from a warm-mist humidifier and an ice-water bath, I got the ice-water bath's temperature range from 1.1C to 1.3C, which is well within the advertised temperature range.  So by definition, it is precise but not accurate; hence, the reason for the one-star reduction in my rating.  For the cost of the thermometer, I can subtract 1.2C from the reading to check the temperature of my fridge freezer.  If you purchase this thermometer, I suggest you do a similar test to determine your thermometer's correction factor.

It was ten business days from my order date to delivery date.

It did ship with one LR44 battery, and it will work with only one battery.  Without open the casing, I am assuming the second battery is wired in parallel to double the thermometer's operation life.

P.S.  I disagree with reviewers who reduce their rating(s) for feature(s) lacking from a product that the seller never advertised the product to have.