This Zoom MRT-3B Micro RhythmTrak Drum machine is in very good condition. The 7 velocity sensitive pads are clean and responsive with very little wear. Buttons and knob function as they should and the unit runs on 4 AA batteries or standard 9v 300mA center negative power supply (not included). It has a 5 pin midi input, 1/4" stereo outs/headphone, and an input for a foot switch (also not included). Although this is a compact drum machine, the pads are a generous size compared to other similar drum machines of this type. 7 pads is an unusual number, but the staggered pad layout is actually quite comfortable for finger drumming.