Korg Wavedrum Mini Dynamic Percussion Synthesizer On-the-go Wavedrum technology with AC or battery power (AA x 6) and built-in speaker Play two sounds at once using the dynamic pad for one, and the versatile Sensor Clip for the other 100 Professional sounds ranging from acoustic to synthetic; plus 10 audio-enhancing effects 100 play-along patterns plus an overdubbing loop recorder for creating rich, complex rhythms Includes 1/4" line out, 1/8" stereo headphone out; plus mounting strap, Sensor Clip, and AC adapter