Dry air kills wood, and your ukulele too. 

• The package includes the humidifier body with innovative sponge, an injector, and a storage bag
• Easy to use. Simply inject distilled water into the nozzle. Do it monthly or bi-weekly if the air turns very dry.
• The humidifier body rests between strings and fits in all ukulele/guitar sound hole.
• Humidifier with leak-resistant open-cell foam that releases moisture slowly and evenly. Ukulele or guitar sounds its best when the body has just the right amount of humidity.