Keeley Seafoam Plus Chorus Pedal ADT/Dimension, Seafoam and Dual Chorus modes Rate, Depth, Space and Mix controls Road-ready metal housing Requires 9V DC power supply (Not included) The Seafoam Plus Chorus will forever change the way you think about chorus Keeley has developed a new type of chorus that, until now, has only been available in expensive DAWs and in studios Not only is it tuned for guitar, but there are voices and modes created specifically for bass players including flanging and tremolo Lastly, this tri-mode chorus pedal offers internal switching for vintage and modern tones, further doubling the amount of sounds you can get