Passionately designed by the master engineers at BOSS in Japan, the BOSS Waza Craft SD-1W Super Overdrive Pedal delivers a premium stomp experience that fans of customized pedal tone will love. Crafted with an ear for highly refined sound, the SD-1W hot rods the famous BOSS overdrive with all-discrete analog circuitry. Standard mode captures the classic SD-1 sound, while Custom mode offers new tonal range and gain. Waza Craft The Art Of Superior ToneSince the beginning, the engineers at BOSS have been committed to achieving the finest guitar tones using any technology necessary, from old-school analog circuits to high-tech DSP. In Japan, Waza is the term for art and technique, and these special edition pedals proudly carry the Waza symbol to represent the pinnacle of BOSS design and craftsmanship. Being made in Japan, the Waza Craft series brings you exceptional tone and touch response through carefully-selected analog components, refined circuitry, and meticulous attention to detail. DC IN JackIt accepts the connection of an AC Adaptor. By using an AC adaptor, you can play without being concerned about how much battery power you have left. Level and Tone KnobThe level knob adjusts the volume when the effect is on, and the tone knob adjusts the brightness of the effect sound. Turning the knob clockwise brightens the sound. Drive KnobThis knob adjusts the amount of overdrive. By turning the knob clockwise, increase the effect. Input JackThis jack accepts signals coming from a guitar or other musical instrument or another effects unit.