Features: Measuring ranges: Temperature: 14 to 140°F Humidity: 10% to 99% RH Simultaneous display of Temperature and Humidity Built-in memory stores Min/Max readings Low battery indication Complete with built-in tilt stand and LR44 battery Measures in °F only. Specifications: Temperature: 14 to 140° F Relative Humidity:10 to 99% RH Resolution: RH: 1% / Temperature: 1° F Accuracy: ± 2° F from 14 to 122°F ±5% Relative Humidity from 25 to 75% RH Battery: LR44, AG13, or equivalent Dimensions: 2 x 1.5 x 0.63" (50.8 x 38.1 x 16mm) The RHM15 is a mini hydro-thermometer monitor which measures humidity and temperature and displays it simultaneously. The RHM15 has a built in memory which stores maximum and minimum readings. The RHM15 features a low battery indication and comes with a built in stand, user's manual and LR44 battery. Measures in °F only.