VALETON Coral Verb II Digital Reverb Guitar Effects Pedal (FBA-CRL-9)16 Carefully selected Reverb Algorithms in one Stompbox suits a variety of Music Styles MIX, DECAY and TONE Knobs for Detailed Effect Control Switchable Reverb Tail function for Cutting the Sound Instantly or Naturally Leave the Decay when Switching off the effects Special Design Buffer Bypass Circuit Keeps the Sound Pristine Working with 9V Center Negative Regular Pedal Power Supply(Not Incl)