Smart Digital Thermometer-Hygrometer: This mini digital thermometer and humidity meter allows you to easily track the temperature and humidity in your surroundings. Temperature measurement range: -50°C to 70°C. Temperature measurement accuracy: ±1°C. Readings are updated every 10 seconds. Humidity measurement accuracy: Indoor/Outdoor Humidity range: 10% RH – 99% RH. Humidity measurement deviation accuracy: ±5% RH. Compact Design and Long Battery Life: This thermometer-hygrometer (4.3 x 4.3 x 1.3 cm; weighs only 21 g) is small, durable, and portable enough to save space and be carried anywhere. Powered by a CR2032 battery (included), providing a battery life of up to 12 months. Wide Range of Applications: This thermometer-hygrometer is suitable for use in homes, offices, cars, schools, hotels, laboratories, nurseries, aquaculture facilities, instrument workshops, libraries, factories, and all air-conditioned environments, among others.