Trigger it from the built-in pushbutton or an external (non-MIDI) electronic drum pad. Pass external sounds through the gated amplifier via the aux input. The Super Space Drum lets you create, control and manipulate a stunning array of synthesized sounds. Specifications Analog drum synthesizer dripping with vintage sound and vibe Creates an awesome array of percussive sounds ranging from really deep kicks to high toms to sci-fi drums Triggers via the on-board pushbutton, an external (non-MIDI) drum pad and most clock generators Process external sounds thru its Aux In Rugged die-cast chassis Works great with the EHX Clockworks Rhythm Generator/Synthesizer, 8 Step Program Ananlog Expression/CV Sequencer and other similar devices EHX 9.6VDC-200mA power supply included, also accepts 9V battery Current Draw: 25mA @ 9VDC Dimensions in inches: 4.0(w) x 4.75(l) x 2.25(h) Dimensions in mm: 102(w) x 121(l) x 58(h) WATCH: Electro-Harmonix Super Space Drum and Crash Pad