roland pk-5 dynamic midi pedal, -13 key pedal board (one octave), defaults to midi bass notes but is transposable through 9 octaves -rugged steel case with hefty weight and rubber backing for excellent floor traction; velocity sensitive -full midi implementation (in, out, thru); receives sysex information; selectable midi channels 1-16; will send midi program changes - operates in five modes: bass (monophonic); poly (polyphonic); drums; sound effects (has sound effects map for "e" series); controller (map for start, stop, fill, etc. commands . can also be programmed -operates off of batteries (included) or power supply (boss/roland aca120 not included)