There are minor scratches from use, but it is fully functional. This is an item for sale of the main unit only. Drive pedal that can mix/use two types of distortion The OS-2 is a drive pedal equipped with two independent distortion circuits: overdrive and distortion. In addition to using the two characters independently, the COLOR knob allows you to freely blend the overdrive and distortion connected in parallel inside the pedal. By realizing a variety of drive sounds with simple operation, it is useful for all guitarists, from beginners to professionals. Colorful sound with two independent distortion circuits The OS-2 is equipped with two independent distortion circuits. The overdrive is a sound directly descended from the OD-1, which was born in 1977 as BOSS's first compact pedal. The asymmetrical clipping circuit provides a pleasant distortion and response like a tube amplifier. With a rich mid-range and a wide range of distortion, it can be used for both solo and rhythm guitar. On the other hand, the distortion is tuned to a thick and wild sound with punch in the low frequencies. It is ideal for playing styles such as intense solos and strumming chords. Mix traditional overdrive and unique distortion The overdrive and distortion circuits are connected in parallel internally, so you can blend each sound. It enables sound making that makes the most of both characters, which cannot be achieved with a series connection. By mixing distortion with overdrive, you can add a tight low end to a warm sound. Conversely, by adding overdrive to distortion, you can add a rich mid-range to the rough distortion and enhance its presence. Easy operation with a simple knob configuration The COLOR knob is designed so that the ratio of overdrive increases when turned to the OD side, and the ratio of distortion increases when turned to the DS side. There is no need to think complicatedly because it is optimally tuned considering the change in volume and the influence of phase during mixing. If you also use the LEVEL, TONE, and DRIVE knobs, you can create sounds as you like with simple operation.