Measurement temperature range: -20℃ to +60℃, accuracy: ±1℃. Measurable humidity range: 20%RH to 99%RH, accuracy: ±5%RH. Built-in sensitive sensor, readings are automatically updated every 10 seconds. Easy to read: The humidity thermometer has a 4.3cm display, the display shows the current temperature and humidity in clear, large fonts, and the reading can also be read from a distance. The thermometer displays the temperature in Fahrenheit or Celsius. Comfort display: The indoor thermometer and hygrometer shows 3 different air conditions at a glance: humid, comfortable and dry. The thermometer and hygrometer are very suitable for monitoring the family's living conditions. Easy to install The humidity thermometer has four installation options: table stand, magnetic back, adhesive, hanging rope. Widely used in rooms, greenhouses, wardrobes, wine cellars, warehouses, granaries. BATTERY OPERATED & TIME SETTING Each thermometer comes with 1 CR2032 button battery, each battery lasts 8-12