Electronically measure humidity and temperature, Features data-hold and relative functions. Humidity range 10 to 95% RH, Temperature range -4 to 140°F (-20 to 60°C), Display Resolution, 0.1°F / 0.1°C / 0.1%RH, Wet bulb and dew point temperature readings, Data-hold and relative function, Dual LCD with bar-graph indication, Includes soft carrying case includes batteries.