Zoom's MRT-3B Micro RhythmTrak is an incredible stand-alone drum machine, and is also the perfect add on to any digital audio recorder that lacks a built in rhythm programming. The MRT-3 features 7 velocity sensitive drum pads, 50 preset and 20 user drum kits (user can make an original drum kit), 200 preset and 99 user patterns, 99 song memory (maximum notes/events: 10,000), 21 note polyphony, quantizes to 96 PPQN, and tempos of 40-250 BPM.
Connections include a Mono out (Line) 1/4" phone jack, Stereo out (Line and Headphone) 1/4" stereo phone jack, a MIDI Input and a Control foot switch jack.
The unit is powered by 4 "AA" batteries or an optional AC adaptor.

7 Velocity sensitive Drum pads

50 Preset, 20 User Drum Kits (User can make original drum kit)

200 Preset,99 User Patterns

99 Songs

10,000 Maximum notes/events

21 sounds Polyphony

Quantize: 96 PPQN

Tempo: 40.0-250.0 BPM

Mono out (Line): 1 x 1/4" phone jack

Stereo out (Line and Headphone): 1 x 1/4" stereo phone jack

MIDI: In

Control In: 1 x Foot switch

AC Adaptor: AD-0006D (Option)

Battery: 4 x AA size