The Big Digit Hygro-Thermometer simultaneously displays indoor and outdoor Temperature and Humidity. Measures Humidity from 10 to 99% RH and Temperature from 14 to 140°F or -10 to 60°C. Accuracy is ±5%RH and ±1.8°F/±1°C. A Max/Min with reset function stores and recalls high and low measurements for all 4 parameters. Complete with built-in stand, wall mounting bracket, outdoor sensor with 35 in. (89cm) cable, and 1.5-Volt AAA battery.