This is a BOSS OD-1 clone pedal. Regarding the sound, it not only replicates the sound of the vintage OD-1 but is also very user-friendly and highly refined due to various switches. Fat Switch When the switch is OFF, it's the same circuit as the original. Bright Control Turning the control knob to the right opens up the high frequencies, resulting in a sharper sound. When the control knob is turned fully to the left, it's the same circuit as the original. Boost Switch Boosts the output without changing the sound quality. When the switch is OFF, it's the same circuit as the original.