This is my web page that discusses this innovative device and its uses and implications. I am currently trying to gather together a team of developers and coders to start this project, As far as I know, I am the creator of said device and have used it wonderfully with all my Crypto currency transactions to date. . . The proposal website is here. .
http://coldcrypto.weebly.com/ I had a look at your page and all I can say is it doesn't look very promising. The device would be corrupt after a few uses and would have no way to transmit the private key to any other medium.
The keys aren't stored on the device. They are stored on external offline memory, they can even be inserted directly into on online phone thaat has and external sd for use,