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Calibrate a new digital hygrometer or humidity sensor before you use it, then re-calibrate it every six months to get the accurate readings to ensure the safety of your cigars.

Don't suffer with dry cigars if you own a drafty wood humidor or live in a low-moisture zone or at high altitude—switch to 75% RH. The Size 320 is good to use in any size humidor, large or small.

For small- to medium-size humidors—up to a 100-count. Choose 75% RH to make up for major moisture loss in a leaky humidor, in a dry climate or at high altitude.

Protects cigars in one 300-count humidor or multiple smaller ones. If you battle low humidity because of a leaky humidor, dry climate or high altitude, choose 75% RH.

Choose 75% RH if you struggle with low humidity because of a leaky humidor, dry climate or high altitude. Smart way to buy to keep cigars fresh in many humidors or just one 500-count model.

75% RH solves challenging cigar conditions, like leaky or inexpensive wood humidors as well as high altitudes and desert climates. Use one single for every 25 cigars yours can hold.

Use in travel humidors and cigar cases that hold up to 5 cigars. 75% RH overcompensates for challenging cigar conditions, like high altitudes and dry desert climates.