The Extech 445713 Hygro-Thermometer with large digit display for indoors and outdoors simultaneously displays temperature and humidity. Humidity measurements from 10 to 99 % rel. humidity, ± 5 % rel. humidity and temperature measurements from -10 °C to +60 °C ± 1 °C (14 °F to 140 °F ± 1.8 °F). A max/min value with reset function stores and recalls the maximum and minimum values for all 4 parameters. The scope of delivery includes an integrated stand, wall mounting bracket, outdoor sensor with 89 cm (35 inch) cable and 1.5 V AAA battery.