Features 1、The design of the thermometer and hygrometer is stylish, compact and portable. 2、Safe and reliable work performance, low power consumption, high accuracy. 3、℃/℉ selection, automatic shutdown, data storage, LCD backlight function. 4、The maximum/minimum display function can measure the wet bulb temperature. 5、ABS shell, wear‑resistant and durable, not easy to damage, can be used for a long time. Specification Item Type: Temperature Humidity Meter Material: ABS Ambient Temperature Range: -20℃-70℃ (-4 ~ 158℉) Ambient Temperature Accuracy: ±1℃ Humidity Range: 0%-100% RH Humidity: Accuracy ±4% RH Dew Point Range: -20℃-50℃ Dew Point: Accuracy ±2℃ Wet Bulb Range: -20℃-50℃ Accuracy of Wet Bulb: ±2℃ Power Supply: 3 x 1.5V AAA Battery (Battery Not Included) Working Current: 13mA, 17mA (Backlight) 999 Sets of Data Retention: Support ℃/℉ Selection: Support Keep Data Display: Support Maximum/Minimum: Support Automatic Shutdown: Support Package List 1 x Temperature Humidity Meter (Battery Not Included) 1 x Instruction