Digital Display Wireless Hygrometer Indoor Outdoor Thermometer Humidity Monitor Product selling point Measuring indoor and outdoor temperature and humidity, Celsius and Fahrenheit conversion Highest and lowest temperature humidity memory function High sensitivity button control for easy operation Comfort indication, temperature and humidity trend indication With backlight, the backlight is automatically turned off after 10 seconds without operation Specifications Indoor temperature range -4 F - 158 F -20 C - 70 C