Casio's new G-Shock Nano fits on your finger - here's how and when you can buy one

It's not a smart ring, it's a watch - one that packs many of the same features as traditional G-Shock watches. And those three side buttons aren't merely decorative.

Casio's new G-Shock Nano fits on your finger - here's how and when you can buy one
It's not a smart ring, it's a watch - one that packs many of the same features as traditional G-Shock watches. And those three side buttons aren't merely decorative.