AKM322 is made up of 32 velocity-sensitive keys, 1 endless encoder, 3 rotary knobs and 11 function Buttons with LED back lit. The internal arpeggiator can build sequences with flexible possibilities The chord Mode can punch out different combinations of keys. The scale Mode helps you hit the right key every time by playing the correct tones matched to the chosen Scale Dew transport controls (Play, stop, Rec, scene up/down, play/ stop clips, overdub, set marker, marker left/right, cycle, tap, metronome) on board arpeggiator with multiple modes and internal/external MIDI clock Chord feature: easily play the most common chords in this versatile Mode Scale Mode: Choose from four different scales and always hit the right key Shift button for second layer control and choose between two performance scenes fully USB powered controller requires no external power source