D'Addario PW-HPK-01 Humidity Auto Control System

Planet Waves has collaborated with Humidipak to develop the first dual humidity control system that provides a consistent 45% - 50% humidity level. The patented Planet Waves Humidipak eliminates all guesswork and speculation about maintaining the proper moisture content of your instrument. Now there's no more guessing where and when to refill the humidifier.

You also no longer have to worry about spilling or getting anything dirty. You no longer have to make manual adjustments based on seasonal changes, geographic location, temperature or other factors. Unlike other refillable humidifiers, the Humidipak provides true dual humidity control.

To maintain the ideal climate for wooden instruments, the Humidipak independently increases or decreases the humidifying liquid.

Features:

Automatic control system constant moisture content of 45% - 50% including pocket for the sound hole and for the headstock 3 pieces humidipaks.