Features: Full metal shell, durable and exquisite. 3 controlling knobs and 1 switch are accurate and high sensitive. Mix knob: Adjust the ratio between dry signal and wet signal. Bit knob: Adjust the range of sampling depth reducing. Crush knob: Adjust the range of sampling rate reducing. Mode switch: Switch between low pass, high pass and normal mode. Output jack: 1/4 mono audio jack for signal output. Input jack: 1/4 mono audio jack for connecting guitar. True bypass footswitch and lever designed to prevent stamping on operation knobs.