Features: Clear and easy-to-read LCD screen. The indoor hygrometer displays different levels of humidity to keep your family healthy and comfortable. Widely used in homes, offices, cars, schools, hotels, laboratories, kindergartens, aquaculture, instrument workshops, libraries, factories, and air-conditioned places. Technical specifications: Material: ABS. Size: 4.3 * 4.3 * 1.3 cm. Temperature measurement range: -10 ℃ ~ + 70 ℃. Temperature measurement accuracy: ± 1 ℃. Humidity measurement range: 10% RH-99% RH. Humidity measurement accuracy: ± 5% RH. Uses CR2032 battery. Includes: 2 thermometers, 2 stickers, and 2 manuals.