Extech 445703 Hygro-Thermometer with RH Indicator has a 1 inch digits displayed on a big LCD screen, Max/Min, and clear functionality. The ranges for this meter are: humidity: 10 to 99% RH, temp: 14 to 140 degrees Fahrenheit or -10 to 60 degrees Celsius, and Accuracy: +/-5%RH; +/-1.8 degree Fahrenheit, +-1 degree Celsius.