Digital Egg Incubator Thermometer & Hygrometer (Measures Temperature & Humidity) Large easy to read display, Battery (included) 1 in operation + 1 spare (total 2) Dimensions: Width = 2 1/2 inches Height = 2 inches Depth = 1/2 inch Measures and displays temperature and relative humidity Measure and display Temperature in Fahrenheit or Celsius (switch in front) Memory function to recall minimum and maximum temperature and humidity reading