And the retail price of the 3 months LOX canister is ... 17.99$ ;-)
And now they say they neither invented an oxygen extracting membrane, nor any specific battery.
So they took most of the magic of the shelf. Where ? I can't guess.
But the canister is their invention ! (who exactly invented that ? Who crafted the one they are using inside the prototype ? A 3D printer ?)
I guess no international authority has approved the use of that canister ... (it's not only a DOT question guys, LOX is a dangerous thing, you could stonefreeze your hands)
By the way, I still can't think of a good reason to rather use (well ... lie about) a thick LOX canister (even if it existed in that tiny size) than a thinner 3000 PSI bottle (Spare Air is already using quite thin bottles). The same amount of oxygen would probably fit in both and it is not 5% of what you would need for a 4 x 45 minutes dive.