Thermometer hygrometer monitor ensures proper indoor temperature and humidity control which important to skin, allergen and other health-benefits Perfect for houses, offices, workshops, schools, markets, warehouses, kitchen Temperature measurement range: -20~120°F (-30~50°C), Accuracy: ±2°C; Humidity measurement range: 20%~100% Mechanical thermometer and hygrometer has a longer life- expectancy in use, no battery required Handcrafted from with fine and clear easy to read the scale, Manufacturer: TSMORY