Easy to adjust: Only 3 three buttons to adjust this hygrometer thermometer. ADJ - Current time setting. MAX/MIN button - Press the "MAX/MIN" button to read the maximum and minimum values of temperature and humidity. MODE: Current time setting and 12/24 hour display. Large visible HD LCD display: Clear and obvious display of temperature and humidity values. Easy to read numbers. With a strong magnet - works well on the fridge and also has a stand for it to stand on. 12/24 hour display models, just press the MODE button to switch. Switch from Celsius to Fahrenheit, just use a little stuff to insert into the hole on the back of the thermometer and find the button to press. Widely used for food, homework, bathroom, etc. training, sports, games, office, etc. One button battery power supply (not included), take out the prepared battery into another hole to start working.