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A classic look in digital form.Western Humidor is a leading manufacturer who has built the reputation of having the most accurate hygrometers on the market. Caliber 4R Digital Hygrometers feature an easy to read, classic look but are powered by advanced, accurate digital electronics. They look great in your humidor while eliminating gauge flutter with slow response updating time. The display features both humidity and temperature readings and has the ability to record maximum and minimum reading.