D'Addario Accessories - GH Acoustic Guitar Humidifier

The Humidifier hangs safely in the sound hole suspend by the instruments strings so it never touches the body of the instrument. Simply moisten the sponge, install and thats it. The humidifier releases the moisture slowly and evenly keeping your guitar perfectly humidified. When the sponge becomes completely dry, moisten it again and insert back into the soundhole.