Protmex MS6508 Digital Temperature Humidity Meter Digital Psychrometer Thermometer Hygrometer Humidity Monitor with Temp

This MS6508 Digital Thermometer Hygrometer is a new type of digital temperature and humidity meter, which designed to combine the functions of humidity meter, temperature meter, wet bulb temperature and dew point temperature. And Dew point is a measure of how much water vapor actually in the air.
Dual Display Humidity and Temperature with Accurate Measuring: Humidity range: 0% - 100%RH. Temperature range: -20