Blackstar HT Dist is a guitar effect pedal designed to produce sound modulations by applying effects such as Booster, Distortion, Fuzz, Overdrive. To provide the musicians with an option to control the desired aspects of their instrument's tone, this Multi - Effects unit is equipped with the following controls: Gain Knob, Bass Knob, Middle Knob, Treble Knob, ISF Knob, Level Knob.