A gain booster that dramatically elevates the performance of all your amps and effects pedals while adding presence. RICH SW = Boosts the mid-low frequencies, adding depth to the sound. SHIFT SW adds bass and shifts the center of gravity towards the lower frequencies, giving the impression that the string gauge has become slightly thicker. By increasing the GAIN, you can achieve a gain boost with a nice density, while lowering the GAIN and increasing the LEVEL allows for a gain boost with a natural push. True bypass specification *Please be sure to use a stabilized adapter.Controls: GAIN, TONE, LEVEL, RICH SW, SHIFT SW Dimensions: Approximately 65(W) × 120(D) × 62(H) mm (including footswitch, jacks, etc.) Weight: approx. 257g Power supply: DC +9V center negative (external power supply only) Current consumption: about 18mA Accessories: Warranty card, rubber feet *Sizes, weights, and colors may vary from item to item.