Provides 50% more humidity output when compared to the original Blue Oasis guitar humidifier, but is conveniently the same size. * Recommended to be used when the room humidity is below 25%. * Ideal for the desert, mountain states or frigid northern environments. * The Oasis Case Plus+ Humidifier can be used in stringed instrument cases such as violin, viola cello, guitar, or mandolin. * Our case style humidifiers attach to the inside of your instrument case * Simple installationYou can see when Oasis is ready for refillLong lasting humidificationWon"t leak due to overfilling