Description: It is a thermometer, but also a hygrometer. Exterior design is bell-shaped, with pointer scale. Suitable to monitor normal in / outdoor weather condition Can be equipped in office, restaurant, hotel lobby, garden, classroom, laboratory, workshop and house, etc. Best environmental temperature and humidity reference: The most suitable environment of the human body: temperature 15 C -25 C, relative humidity 45%RH-75%RH Home environment: 40% RH-70% RH Libraries, art galleries, museums: 40% RH-60RH Computer computer room, communications room: 45% RH-60% RH Cloth, cotton textiles placed: 40% RH-60% RH Milk storage: 50% RH-60% RH Fruit storage: 60% RH-70% RH The most favorable against the disease environment: 30% RH-50% RH Features: Easy to read Dependable reading with high accuracy Conenient size Color indicator for comfort zone With a hook for wall mounting or rack Specification: Measuring range: Temperature -30 - 50 , error 2 Humidity 20% -100%, error 5% Dimension: 7.5 X 2.3 cm Notes: This product should be placed in the natural ventilated place, far away from the heat source, avoid sudden fever, don't be sunlight directly.