The diamond pedals classic tremolo is a revolutionary pedal that takes tremolo effects to the next level'. '.strtoupper('b')oasting a unique optical amp style effect plus a fet chopper with momentary dicer function it offers both warmth and precision'. '.strtoupper('w')ith 11 rhythm control positions three different modes and advanced features such as insta chop and doubler youll be able to explore the full range of vintage tremolo built for the modern day'. '.strtoupper('f')or those seeking maximum simplicity geezer mode disables the secondary footswitch functions and depth and duty settings can be changed by adjusting the depth knob when in momentary or latching mode'. '.strtoupper('h')andmade in montreal canada with high quality components like custom us made opto isolators and burr brown ics this pedal is powered by a regular 9v dc psu and will provide you with all the classic tremolo sounds plus modern tone shaping!