Mini round digital humidity thermometer lets you easily know the temperature and humidity of your surroundings. Fahrenheit conversion (F) or Celsius (C), this round thermometer displays the temperature in Fahrenheit or Celsius (by pressing the C/F conversion button). Temperature measurement range: -50-70 ℃ (-58- 158 ℉); Humidity measurement range: 20%-90% RH (measures conditions every 10 seconds). Temperature measurement accuracy: +/- 1℃; Humidity accuracy: 5% RH. Mini and compact design with clear LCD display, can be used in various environments such as offices, nurseries, greenhouses, etc. Product Description Package includes: 4 x round hygrometer thermometer High reliability and accuracy Fast response measuring every 10 seconds with 24 sensitive vents to provide up-to-date and accurate readings. Care for your health: Measures conditions every 10 seconds to quickly identify changes in temperature and humidity. The updated display is ideal for taking care of your family's living conditions and health by preventing colds, bronchitis, arthritis, and headaches. Wide range of applications: The diameter of this hygrometer thermometer is only 1.65', its space-saving design allows it to be used in various environments such as offices, bathrooms, nurseries, greenhouses, etc.