• IP65 dust/waterproof, suitable for indoor and outdoor use: The outdoor thermometer is IP65 dustproof and waterproof and can work safely even on rainy days. Just add 3 sensors via Wi-Fi. They are easy to use, lightweight, and portable. Perfect for kitchens, bathrooms, greenhouses, refrigerators, guitar cases, humidors, attics, basements, crawl spaces, and much more. • Sensitive to temperature and humidity changes: With a built-in Swiss Sensirion industrial sensor, you can expect accuracy up to ± 1.8% RH, ± 0.2 °C, with a fast and accurate sampling interval of 4 seconds to continuously monitor temperature and humidity in the surrounding environment. • Smarter notification alerts: The hygrometer supports readings of dew point temperature, VPD, absolute humidity, temperature, and humidity as Scene condition. When any preset value is exceeded, our app can send a notification alert so you can react in real time to changes in nurseries, pet houses, freezers, wine cellars, instrument cases, crawl spaces, reptile tanks, terrariums, and much more. • Supports data export: Enjoy up to 68 days of onboard data storage, and unlimited cloud storage. Using our updated color data charts, you can clearly see annual, monthly, daily, or hourly temperature and humidity. The data can be exported as a .csv file for deeper analysis of your environment. Supports multiple data calibration methods