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.

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Casio has launched a new G-Shock smartwatch this week in the form of the Casio G-Shock GBA-400 which is equipped with Bluetooth 4.0 connectivity and is constructed using a shock and waterproof casing.

Rik is Pocket-lint's senior news editor and has been a tech and games journalist since the 80s. He has seen and covered just about every console, mobile phone, gadget and home cinema device launched ...