The electro-harmonix Intelligent Harmony Machine instantly creates harmonies that match your playing. It's like having one or even two guitarists jamming along to your playing at the same time, always in perfect sync. This opens the door to music like multi-lead guitar bands and multi-part harmony solos. Plus, the ability to create a wide range of harmonies, from simple to sophisticated, will transform your playing. Of course, it also boasts the flawless tracking and impeccable musical tone that Electro-Harmonix is renowned for. It also features a momentary mode, which changes pitch only while the pedal's footswitch is held down, and an option to apply a user-defined sweep time when switching from dry to effect. You can change the pitch instantly, or control the time it takes to sweep up and down between the dry and processed signal at intervals set by the Intelligent Harmony Machine. Mike Matthews, founder of Electro-Harmonix, said: We designed the Intelligent Harmony Machine for players looking for maximum power in a minimal footprint. Experience its sweet, musical tone and flawless tracking. - Compact and powerful harmony generator and pitch shifter - Perfect tracking and excellent musical tone - Two modes: Intelligent Harmony and Polyphonic Pitch Shift - Intelligent Harmony mode generates diatonic harmonies in a set key based on the single note you play. All 12 keys are accessible via the Key Selector and #/- switch. - Polyphonic override mode allows playing single notes or chords, with 11-position interval selector switch for selecting harmonies. - Momentary mode allows you to activate the effect only while holding down the footswitch, or you can set the time it takes for the signal to sweep up or down. - EHX 9.6DC-200 adapter included / Can also be powered by a 9V battery - Dimensions: 70mm (w) x 113mm (d) x 50mm (h)