Humidity alarms warn when the %RH exceeds a pre-set HI or LO limit. It also features Humidity and Temperature calibration adjustments. The unit can be wall- mounted or placed on a flat surface using the fold-out stand. This professional meter, with proper care, will provide years of safe reliable service. Meter Description 1. Temperature-Humidity Sensor 2. %RH Display 3. Dew Point Display 4. Temperature Display 5. %RH LED alarm 6. Max/Min push button 7. Reset push button 8. Audible Alarm ON/Off