D'Addario Two-Way Humidification System Black

D'Addario collaborated with Humidipak to create this first-ever two-way humidity controller, which maintains a constant 45% relative humidity level. The Humidipak humidification system completely eliminates all the guesswork and anxiety of maintaining musical instrument's proper humidity level. No more guessing if or when to refill the humidifier and worrying about drips or mess. Unlike all refillable humidifiers, the Humidipak acts as a gauge because it provides true "two-way" purified humidity control. It adds or reduces moisture only as needed to maintain 45% RH—the ideal climate for wooden instruments, such as acoustic guitars.Just place two packets in the double pouch. Put the double pouch over D and G strings, and let it hang down into the soundhole. Place the third packet under guitar's headstock in its case. Close the case, and 're done. The packet will last anywhere from 2–6 months, depending on the humidity where are. When the packet become firm, discard and replace. The D'Addario Humidipak humidity controller is as simple as that.