The best-selling D'Addario Acoustic Guitar Soundhole Humidifier makes it easy to properly and safely humidify your guitar. The Humidifier hangs safely in the Soundhole suspended by the instrument's strings so it never touches the body of the instrument. The humidifier releases the moisture slowly and evenly, keeping your guitar perfectly humidified.
 
Kits to monitor and properly humidify your acoustic guitar
Protects your instrument against warping, cracks and other damage caused by lack of humidification
Humidifier never touches the instrument body
Humidifier releases moisture slowly and evenly
Humidity and Temperature Sensor accurately displays humidity and temperature levels on an easy to read digital display with built in clock, calendar, and memory function