Cigar Oasis Caliber 4R Digital/Analog Hygrometer Hygrometers It is designed to retain

It is designed to retain ashes inside no matter where the wind blows

High-end sparkling crystal glass built to last

Powered by a thin but durable electronic ribbon cable that fits through humidor seal

The sensor constantly monitors the humidity which then activates the fan as needed to produce the cleanest humidity possible

While the Cigar Oasis Plus 4

Cigar Oasis Caliber 4R Digital/Analog Hygrometer Hygrometers It is designed to retainThe accuracy of digital meets the beauty of analog. Released in 2014, this beauty has quickly become a staple because of both its beauty & accuracy. Built on the reliability of Caliber IV, this attractive classic analog design displays Humidity & temperature readings, Fahrenheit Celsius readings, 72 hour high low & averages for humidity & temperature, Gauges between 20 90% Relative humidity (RH) Advanced humidity sensor maintains accuracy to + 3% User