I was watching some videos from the famous Bitcoin vlogger, Joe Nakamoto.

Noticed he pays lightning using his ring, or watch, that looks like some next gen sci-fi shit. Just curious, what exact device is that, and how to set it up?

I keep my lightning sats in my Blockstream Green wallet, on my android phone. So I have to pay by scanning a QR. Does that device link with the Blockstream app to send the payment?

Any tutorial or guidance will be appreciated.