.This distortion pedal has 2 gain control.It mean that can make sound from soft distortion to loud distortion sound like £í£å£ó£á¡¡£â£ï£ï£ç£é£åmark iv amp. .Gain1 increases treble distortion, adjust the former level of distortion .Gain2 controls the amount of bass distortion, adjust the saturation level of distortion .Level£ºadjust the output level Dimension: 45*24.5*33.2 0.32kg