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ActiveAir Indoor-Outdoor Thermometer w/Hygrometer
Active Air's indoor-outdoor thermometer gives you more. Made of sturdy materials to stand up to any kind of weather Mother Nature might throw your way, as well as the climate of your indoor grow room, this essential tool features a large display to read the current temperature and humidity levels. A second, remote probe allows you to sample two temperatures at once and record the high and low points for both temperature and humidity. Instructions