【Professional Dual Display Thermometer Hygrometer】High-precision digital sensors from the US ensure accurate measurements, refresh every 0.4s, and Include a function to lock the current reading. Temperature range: -4~140℉(-20℃-60℃), Humidity range: 0~100%RH. Incloud 4 types of temperature modes: humidity, ambient temperature, wet bulb temperature, and dew point temperature. The dew point is a measure of how much water vapor is actually in the air

【Multifunctional Protmex Temperature Humidity Meter】°C and °F humidity meter; Temperature mode switcher: ambient, dew point, and wet bulb temperature; Datastore and read; Max hold and min hold functions can view the maximum and minimum values of the 99 previously stored data sets; Low battery indicator; 4 AAA batteries included

【Backlight LCD Display Temperature Humidity Gauge】Protmex temperature and humidity meter are equipped with a backlight LCD screen, which is appropriate for gathering the data at night. To save power, it will auto shutdown, if without any operation after 30 minutes

【Widely Used Digita l Psychrometer】Adopt industrial-grade high-precision digital sensors from the United States, easy to use and accurate, suitable for various fields——HVAC, industry, agriculture, meteorology, medical, daily life, building engineering, paranormal investigator, in the wine cellar, machine room, in living and office area, traffic environment, and data storeroom

【Protmex 24/7 Support】We provide 12 monthly quality guarantee. The Protmex support team is able to respond to your questions and requests within 24 hours. If you are not satisfied with the product, please feel free to consult for help