Moozikpro Acoustic Guitar Humidifier - Leak-Proof & Humidity Indicator included PROTECTS FROM LOW HUMIDITY that can cause low string action, splits or protruding fret ends LEAK-PROOF - Slow and even humidity release with rubber sleeve and open cell sponge HUMIDITY INDICATOR INCLUDED - Shows the percentage of humidity where you store your guitar MULTI-USE - Suspends by strings or by supplied convenient rubber cover EASY TO USE - Moisturize twice a month or when needed for optimal 45-55% humidity