MXR M107 Phase100 Ten Stages of Programmable Phase Shifting Pedal  
Four-position rotary switch selects four preset waveforms.
Great for guitar, bass, keys, vocals.
This big brother of the Phase 90 offers an even broader range of sounds. Along with the speed control there is a 4-position rotary switch that selects between four different intensities, defined as preset waveform patterns. Great for guitar, bass, keys, vocals, and more!

Optional Power: Dunlop ECB003 AC Adapter or Single 9 volt battery