Features: Simple appearance, high accuracy. Hook designed, you can put it on wall. Large clear display, dial-type, easy to read. Stainless-steel material, high-temperature resistant. Designed for high-temperature environment. Widely used in laboratory, planting-industry, instrument workshop, library, hospital, computer room, hotel, restaurant, family and more. Specifications: Material: Stainless-Steel Temperature Measuring Range: -20℃ to 100℃±1℃ Humidity Measuring Range: 0 to 100RH±5RH Dia: About 126mm/4.96in Package Includes: 1x Temperature Humidity Detector note: The use of the environment should be clean and less dust, dust affect the value of the accurate. This product should be placed in a naturally ventilated place, away from hot and cold sources, avoid sudden heat, do not be exposed to sunlight. Do not directly contact the steam-, do not blow air to it with mouth, otherwise it will make the device condensation, resulting in indicating value drift.