Product Description Protect your instrument investment with the D’Addario Accessories Acoustic Guitar Humidifier. This best-selling humidifier releases moisture slowly and evenly keeping your guitar perfectly humidified and protect against warping, cracks and other damage caused by lack of humidification. Proper humidification is a necessity to maintain the stability and playability of your instrument. It is essential to humidify all wooden instruments. The D’Addario Acoustic Guitar Humidifier includes everything you need to protect your instrument and prevent it from drying out. Simply moisten the included sponge, place into the humidifier housing and insert in the sound hole of the guitar. When the sponge becomes completely dry, re-moisten it and insert back into the sound hole. That’s it! The humidifier hangs in the sound hole of the guitar, so it never touches the body of the instrument. It is suspended by the strings and has no clips or fasteners which can scratch the guitar finish. For over 20 years, D’Addario has been leading the industry in innovative and problem-solving products that serve musicians worldwide. D’Addario Accessories are proudly made in a state-of-the-art manufacturing facility in the USA to the most stringent quality controls in the industry. The D’Addario family’s heart, soul and love for making music is put into every accessory we create, and we never stop inspiring performance. The number one cause of major guitar repairs is lack of humidification. Humidifying your guitar is an essential step in maintaining your instrument. The best selling Planet Waves Acoustic Guitar Humidifier makes it easy to properly and safely humidify your guitar. 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 that's 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.Planet Waves, part of the D'Addario family of brands, is known for innovative, problem-solving, quality musical accessories. Planet Waves offers a complete line of award-winning accessories including cables, picks, tuners, capos, straps, humidifiers, maintenance tools and more. From the Manufacturer The number one cause of major guitar repairs is lack of humidification. Humidifying your guitar is an essential step in maintaining your instrument. The best selling Planet Waves Acoustic Guitar Humidifier makes it easy to properly and safely humidify your guitar. 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 that's 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.Planet Waves, part of the D'Addario family of brands, is known for innovative, problem-solving, quality musical accessories. Planet Waves offers a complete line of award-winning accessories including cables, picks, tuners, capos, straps, humidifiers, maintenance tools and more.