via this auction
You can find demos of one in previous posts here.

Its sound engine provides 6 different instruments, each with over 30 parameters to tweak. It can produce a wide variety of sounds, ranging from classic analogue emulations to crunchy digital mayhem.
Cortex M4 based
6 voices (VA and FM)
7 sequencer tracks (extra open HH channel)
44kHz / 16 bit audio
4 mono outputs
4 different instrument engines
1/128 step pattern resolution (32ppq)
USB/Din Midi
different lengths for each track possible
8 chainable patterns per preset
Step probability
SD-Card
Cowbells!
39 buttons
6 LFOs routable to every voice parameter
complete kit. comes with all needed parts for assembly
No SMD soldering required
source code available
All! actions possible without stopping the sequencer playback
Includes:
Erica Synth Metal enclosure
2GB SD-Card (with latest update)
Trigger IO"
Great drum machine! Much more intuitive to use than I would have expected and great sound.
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