High Resolution LCD Display: This is a digital meter that can display temperature and humidity simultaneously. A large LCD display with large digits makes it easy to read. Wide Measuring Range: Temperature Measuring Range: -50 to 70 with 1C accuracy; Humidity measurement range: 10%RH~90%RH with 5% accuracy. Application Occasion: The round digital thermometer hygrometer can be widely used to measure temperature and humidity in buildings. homes, baby's room, offices, workshops, schools, markets, warehouses, etc. Battery installation: Switch on the back of the product; Push the battery compartment cover in the direction indicated by the arrow. Put the button cell batteries in the battery compartment. Powered by 1*LR44 battery. Quality Assurance: Customer service team will spare no effort to help you within 24 hours- Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.