I used this for acoustic guitar playing and singing. It transforms the sound into something quite beautiful, and as it's now discontinued, it's a valuable item. It works perfectly. A guitar effects pedal that provides a variety of effects. - Model Name: Supernatural Ambient Verb - Brand: Digitech - Control Knobs: 4 knobs (Echo, Reverb, Mix, Tone) - Connection Terminals: Input and output terminals Thank you for looking.