The third form of the evolved raging horse IRON HORSE, a highly acclaimed distortion pedal with punch and thickness, has been redesigned into Version III. While retaining its devastating high-gain sound and true bypass, the pedal has been reborn as an even more user-friendly pedal, featuring a soft switch and a knob that allows you to blend between silicon and LED clipping diodes. Introducing the Iron Horse LM308 Distortion V3, Walrus Audio's modern-day classic distortion pedal. -Soft switch -Input jack located on top -Si/LED knob Equipped with a Si/LED knob that allows you to blend silicon clipping and LED clipping. Turning it to the left produces highly compressed silicon clipping, turning it to the right produces less compressed LED clipping, and in the center position produces a complex clipping sound with a different ratio of silicon to LED clipping. Power supply: 9VDC center negative (for adapter only) SIZE: 12.5 x 6.7 x 5.8 cm