【Smart Digital Thermometer Hygrometer】 This mini digital thermometer and humidity thermometer allows you to easily monitor the temperature and humidity in your surroundings. 【Temperature Measurement Range】 Temperature measurement range: -50℃ ~ 70℃. Temperature measurement accuracy: ±1℃. Measurement conditions are updated every 10 seconds. 【Humidity Measurement Accuracy】 Indoor/outdoor humidity measurement range: 10%RH-99%RH. Humidity measurement deviation accuracy: ±5%RH. 【Small and Long Battery Life】 This thermometer and hygrometer (4.3 * 4.3 * 1.3 cm, weighs only 21 g) is small, durable and portable enough to save space and make it easy to carry. Powered by CR2032 (battery included), battery life up to 12 months 【Widely Used】 The thermometer hygrometer can be used at home, in the office, in cars, schools, hotels, laboratories, kindergartens, aquaculture, instrument workshops, libraries, schools, factories and places equipped with air conditioning, etc.