【Mini Hygrometer Thermometer】This mini digital thermometer and humidity meter helps you quickly determine the temperature and humidity you want to measure. The portable digital thermometer and humidity meter is a good helper for your work and leisure. Size: 4.5x4.5x1.6 cm 【Temperature and Humidity: Two Functions】This humidity meter can measure both humidity and temperature. Convenient to use. Working temperature from 0 to 70 °C (+32 °F ~ +158 °F), working humidity from 10% to 99% RH. 【Temperature Switchable】This humidity meter can be converted from Celsius to Fahrenheit by clicking the back button. Suitable for different measurement habits. Note: Long press to turn the hygrometer on or off. Powered by LR44 button battery, included in the product. 【Fast Response】This reptile thermometer has a built-in sensitive sensor. Readings are automatically updated every 10 seconds. Multiple air holes ensure more accurate detection. Temperature measurement accuracy: ±1 ℉, humidity measurement accuracy: ±3% RH. 【Widely Applicable】The digital LCD screen can be used in homes, offices, garages, schools, hotels, laboratories, nurseries, aquaculture, tool workshops, warehouses, reptile aquariums, fish tanks, hermit crabs and other places where temperature/humidity measurement is required.