Unlike most rings, Casio's G-Shock Nano DWN-5600 is one-size-fits-all, thanks to its adjustable strap. Look for it in Japan ...

The new G-Shock Nano DWN-5600 has launched in Japan and features an adjustable finger strap.

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.

One of the curious quirks of technology is the trickle-down effect. Tech tends to get cheaper and more widely available as time goes on. Take the new Casio W220H-Series digital watches, for example.

There’s no fitness tracking or heart rate monitoring with Casio’s new wearable. There’s no fitness tracking or heart rate monitoring with Casio’s new wearable. is a senior reporter who’s been covering ...