The humidifier is widely used in various fields, including homes, laboratories, animal husbandry, instrument and meter workshops, libraries, hospitals, computer micro-computer rooms, etc., especially with the continuous improvement of people's living standards, air conditioning and heating have entered families, hotels, restaurants, measuring the environment's temperature and humidity is more important. Measurement range: Temperature -10℃ to 40℃ Humidity 0RH to 100RH Technical indicators: Temperature below 10℃ ±15℃ 10℃ to 25℃ ±1℃ Above 25℃ ±15℃ Humidity below 40 ±7RH 40-75 ±5RH Above 75 ±7RH Environmental temperature and humidity reference value: ★ The most suitable environment for the body: 15℃-25℃, relative humidity 40RH-75RH ★ Living environment: 40RH-70RH ★ Library, art museum, museum: 40RH-60RH ★ Computer micro-computer room, communication room: 45RH-60RH ★ Fabric, cotton and woolen textile storage: 40RHRH60RH ★ Milk products storage: 50RH60RH ★ Fruit storage: 60RH70RH ★ The most favorable environment for disease prevention and treatment: 30RH50RH Notes: 1. This product will be free of charge for repair or replacement within six months from the date of purchase, provided it is not damaged due to human error. 2. This product should be placed in a place with natural ventilation, away from heat and cold sources to avoid heat accumulation, and should not be exposed to sunlight. 3. The use environment should be clean and dust-free. Dust may affect the accuracy of the display, and it must be used perpendicular to the strong surface. 4. Do not directly contact steam or blow into the device with your breath, as this may cause condensation within the device, leading to drift in the display value.