Not a whole lot of details but this is what I know: Apparently it works for up to 5mm lines. "For smaller lines common in caves, knots will pass right through." So basically, if the knot measures less than 5mm in diameter it should be okay.
Will be posting a second video next week with links for pre-order. Cost will be $500 USD and will be available starting Feb 2017. Depth rated to 130m.

Pretty interesting.