Didn’t see anyone post this here yet and thought it might be of interest to folks so…
Looks like a fun feedback/contact mic instrument. Basically the victorian oscillator idea but using a transducer, and then using the feedback to vibrate on other surfaces rather than the speaker cone. All implemented in a nice rechargeable wire-free little package. I can imagine having a bunch of these going in a resonant space with some different surfaces could be really fun.
Daniel Araya does nice work so I have no doubt its well built- he worked on the restoration of the Synthi 100 at Radio Belgrade and at least did (probably still does?) work at EMS Stockholm as a tech and is very friendly.