The Big Digit Hygro-Thermometer measures 1 in. digits on a very large LCD. It displays humidity from 10 to 99% and temperature from 14 to 140°F (-10 to 60°C). Accuracy: ±5% RH and ±1.8°F/±1°C. Maximum/minimum with a reset feature. Comes with stand, wall mounting bracket, and one AAA battery.