SPECIFICALLY FOR ACOUSTIC PLAYERS! Moen listened to the comments of both stage and studio players and redesigned this special guitar pedal for both stage and personal recording studio applications with even more options for different musical situations! Simple effective and fast direct link to power up your acoustic guitar. Not meant to be harsh and offers clarity and lets the true tone of the instrument and pickup design shine through. Specifically voiced for acoustic application !It features Volume or GAIN level, inverted signal switch and Insert to add effects and Ground Lift. A must if you are an Acoustic guitarist. The pedal can be powered by AC power adapter - 9V 200ma (not included)