Joyo JF-17 Extreme Metal, High-Gain Crunch with 3-Band EQ and Gain Boost Maximum gain pedal delivers crushing metal sound Tone exemplifies (amplifies!) solid state clipping Dial in the perfect sound with the 3-band EQ controls Quality components, resistors, jacks, etc. *9V battery included ON/OFF and "Boost" Switch - Accurate Timing, Stompbox Style