Electro-Harmonix Super Space Drum Analog Drum Synth Analog drum synthesizer dripping with vintage sound and vibe, creating an awesome array of percussive tones. Triggers via the on-board pushbutton, an external (non-MIDI) drum pad and most clock generators Processes external sounds thru its Aux In Works great with the EHX Clockworks Rhythm Generator/Synthesizer, 8 Step Program Analog Expression/CV Sequencer and other similar devices Includes EHX9.6DC-200 power supply, also accepts a 9V battery