The BOSS OD-20 Drive Zone is an advanced overdrive/distortion pedal that utilizes BOSS's COSM technology, allowing it to effectively model the sound of classic pedals while also offering its unique tones. With a selection of 22 different models, this pedal caters to various musical styles and preferences. The OD-20 is equipped with innovative parameters such as 'Attack Shape' which adjusts the dynamics of the overdrive response. The 'Heavy Octave' feature can produce low octave sounds, enhancing the versatility of this pedal for modern rock musicians. Additionally, musicians can store their favorite settings using the four user memories. Though discontinued, the OD-20 still stands out in its exceptional ability to recreate iconic overdrive sounds from history.