Measures: 5 to 95-Percent Relative Humidity (RH) Measures Temperature from 14-Degree-F to 122-Degree-F (-10-Degree-C to 50-Degree-C) Displays Relative Humidity and Temperature together Auto power-off Fast, accurate electronic sensor The UEi DTH10 combines Temperature and Relative Humidity Readings in a convenient pen-style case. The UEi DTH10 uses a quick-response sensor to measure at the same time Temperature from 14�F to 122�F (-10�C to 50�C) and Relative Humidity from 5% to 95%. The UEi DTH10 includes a Min/Max record feature, Data Hold, Auto Power Off to protect Battery life and features an easy-to-read display.