If you own a Elektron Machinedrum then this is a game changer. Adds tonnes of features to the standard Machinedrum. Such as conditional trigs, micro timing, chromatic mode, etc. Basically makes the Machinedrum much more like modern Elektron devices. Plus includes a six channel polyphonic MIDI sequencer. Running the latest firmware, has been tested and works fine. This is the DIY version, selling at a lower price because the enclosure though physically sound, isn't the best looking. It was originally all black ABS but the 3-D printing didn't come out that great, so I spray painted the top silver, which looks OK but I don't think will last that long? Gets scratched pretty easily. maybe someone with better knowledge could do a better job? Also works with the Monomachine. Open to reasonable offers. *Please note this is running an official Arduino, not a clone.