product descriptions:Size: approximately 12.5 x 7 x 1.92 (cm)Size of LCD: approx. 51 x 51 (mm)Temperature sensor: 1.5 mPower supply: 1 x battery AAA (not included)Range of temperature:Exterior:-40 ° C ~ + 70 ° C (-58 ° F ~ + 158 ° F)Interior:-10 ° C ~ + 50 ° C (14 ° F ~ 122 ° F)Accuracy: ± 1 ° CWith a suspension and supportFahrenheit and Celsius adjustable.Theory: Temperature SensorUsage: Indoor & outdoor