Neewer Compact Classical Electronic Overdrive Guitar Effect Pedal True Bypass, Provides Two Tone Mode (High Peak/Low Peak Mode), Easy Controls with Great Responsive Performance Features two modes: HP Mode for enlarging the output to get the tightened electromagnetical sound; LP Mode for reproducing the classical electronic overdrive with plump, warm and sweet effect Sturdy construction with solid metal housing, smooth knobs, solid switched, and well-built jacks Compact small-sized petal allows for easy placement and convenient portability Simple and intuitive pedal with a LED indicator shows the working state, easy to use Can only be powered by 9V Power Adapter with tip negative(NOT INCLUDED). Note: Pedal ONLY. Guitar and Cables in the pictures NOT INCLUDED