Add an NFC Tag to Your Watch for Quick Access From Anywhere
You can do all sorts of cool things with the NFC tag , and on top of that, on Node, they point out that adding one to your watch makes it so you always have it with you.
The idea here is pretty simple. The node takes a cheap watch, adds an NFC tag (and a microSD card so you always have some storage space) and links it to your Android phone to unlock. Obviously, you can use your NFC tag however you see fit, but this is an easy and discreet way to keep it with you at all times.