The Joyo R-02 Taichi Overdrive Guitar Effects Pedal is a low gain guitar overdrive which delivers smooth blues, country, jazz and fusion tones associated with some of the finest amplifiers in the market. The Joyo R-02 Taichi Overdrive Guitar Pedal features a little more compression and a little more sustain. It has four knobs control the overall volume, gain, tone and voicing of the pedal.