Check the listing for details. Electro-Harmonix Mod Rex Polyrhythmic Modulator. Condition: New. Listed at 283.80 USD. The MOD REX is a kinetic tour-de-force that lets you weave compelling, shifting, musical tapestries. Whether you are a guitarist, synthesist or electronic musician you will find it inspires your creativity and stretches your musical boundaries. Features: Up to four simultaneous modulation sections synced in time. MOD section offers a choice of Vibrato, Flanger, Chorus or Phaser Standalone Tremolo, Modulated Panning and Modulated Filter sections. 9 tempo subdivision options for each modulation section. 4 LFO shape options for each modulation section 100 storable presets Full stereo input and output Tap Tempo and Tempo Sync to an external device with MIDI Clock or an external pulse clock Full MIDI control of all parameters and recalling of presets External expression pedal input External foot controller input to bank presets up and down 9.6VDC/200mA power supply included