Provides a range of excellent usable reverb tones With 3 functional knobs (Mix/Decay/Prd) for adjusting a wide range of reverb tones and delay time PRD knob to set the delay time, Decay knob to adjust the length of the reverb and the Mix knob to contral the amount of reverb This pedal is similar to the spring reverb effect of the analog amplifiers, the reverb sound is very natural and clear With durable and stable aluminum alloy blue shell and mini size, space-saving and portable