12/24 hours selected with alarm, calender and integral alam function. Temperature type is changeable ( ℃/℉). Best for use in factory, storehouse, production, hospital, laboratory, dispencing room, computer room, etc. Displays time, temperature and humidity. Convert Celsius or Fahrenheit. Store the highest and lowest humiture. With this digital hygro-thermometer you can measure temperature and humidity around. It has big size LCD display that shows time, temperature, and humidity. Powered by one AAA Battery (Batery incluede). Temperature range: 0 ~ 50 ℃(32-120℉) accuracy: 1.0 ℃. Humidity range: 30% -90% accuracy: ±8%.