I think they have working prototypes?
Alexander.
Where do they state that? But even if they state it, I don't believe it. The necessary miniaturation for fitting in enclosures requires a 10000-run batch.
They may have a "working schematic" but it isn't documented and I don't see it. All I see is they have a 3D printed or otherwise CNC machined "cover" witch cannot contain the working schematic at this time.