Features: Long Lasting Designs This thermometer hygrometer utilizes precise physical temperature measurement without the need for batteries, ensuring reliable and durable performances. Temperature Sensing Solution The built in temperature sensing solution is safe in case of tube breakage. Temperature and Humidity Function Designed for convenience, this thermometer hygrometer features a clear display for easy reading of both temperature and humidity levels. Color Coded Display for Clear Readings With color coded indicators, this thermometer hygrometer provides an easily understandable representation of various temperature ranges, enhancing user friendliness. Multiple Styles to Choose From This thermometer hygrometer comes in various styles, offering precise measurement, heavy construction, and high quality paint finish. Suitable for home, office, hotel, restaurant, school, factory, conference room, shopping mall, warehouse, pharmacy, hospital, laboratory, airport, theater, greenhouse, family garden, and livestock farming. Specifications: Material: Metal, Plastic Size: 1: Approx. 123x123mm/4.84x4.84in 2: Approx. 130x130mm/5.11x5.11in 3: Approx. 130x130mm/5.11x5.11in 4: Approx. 53x230mm/2.09x9.05in Range: Type 1: -30 to 50℃, 20-100%RH Type 2/3: -25 to 55℃, 10-100%RH Type 4: -35 to 50℃, 0-100%RH Type: 1/2/3/4 Package Includes: 1x Temperature Humidity Detector note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.