TONEWHEEL BOOST is a dynamic and transparent booster which makes your tone much bigger! It adds more power but does not alter the natural tone or dynamic of your guitar and amp. It offers smart, “hands-free” gain control and a unique skateboard-based design. Gain control ranges from unity (1:1) to +23 dB of gain. Mode switch selects between Full Range boost and 808-style mid-hump boost. Passive tone control cuts highs when turned counter-clockwise. True bypass switching. It runs on 9 V battery or 9 V DC adapter, internally converting to ~15 V for added headroom.