Oasis Guitar Humidifier outside US Our Oasis® Ukulele humidifier ($17.95 with free shipping in North America) has two unique features: The mounting system allows the humidifier to hang horizontally inside the ukulele rather than vertical (like the guitar humidifier). Secondly, the humidity output is about 50% of the Royal Blue Oasis guitar humidifier, to accommodate the smaller instrument size. This also allows the humidifier to last twice as long between refills. Oasis® Ukulele humidifier ($17.95 with free shipping in North America) To watch a video demo see: Oasis Guitar Humidifier Demo |