The ThermoPro TP55 thermometer for the house provides the most accurate measurements, be it for indoor humidity or temperature, allowing you to adjust for your household such as displaying 24-hour/all-time high/low records and current trends for both humidity and temperature and humidity level icons that indicate if your home is too humid, too dry or just right! The indoor thermometer and humidity gauge is highly accurate and user-friendly with a backlight for nighttime last-minute checks on current readings before bed. No longer will it be necessary to unmount the device off your wall or fridge to switch settings, simply use the touchscreen display. Specifications: Professional accuracy 2-3%RH and ±1°F/°C to provide the most reliable readings possible Wide temperature range from -58°F to 158°F (-50°C ~ 70°C) humidity range from 10% to 99% RH All time/24 HRs : Allow you to see temperature/humidity in the past or last 24 hours. Displays the Trend of Each Reading