Technical Parameters: Operating Temperature: -10 ‘ C~ +50 ‘C(-50 ‘ F~ +122 ‘ F) Measure Temperature Rang(thermistor/probe in water or air): -50 ‘C~ +70 ‘ C (-50 ° F~ +158 ‘F) Accuracy:+/-1 ‘C or F Temperature resolution: 0.1 ‘C or F Power : 1.5 VDC (one LR44 battery, NOT included); Physical Size: 59 X 37 mm; Display Size: 26 X 13 mm.