Welcome, you are looking at a great piece. This is the Electro Harmonix Crash Pad Electronic Crash Drum Pedal. The new Crash Pad, an updated version of the 1980 original, is an electronic drum synthesizer that can create an array of drum sound and oscillation sweeps, as well as process external sounds through its resonant filter. Sounds like snare drums, cymbals, and oscillation sweeps can be triggered via the on-board pushbutton, a non-MIDI external drum pad, and most clock generators. This updated version also responds to expression pedal/CV input for external control over the filter in real-time. The EHX Crash Pad Electronic Crash Drum even comes with an AC adapter, but can accept a 9 volt battery. We are an authorized Electro Harmonix dealer. Don't pass this by.