At first glance, this may look like an odd-shaped bolt from your toolbox. In reality, it's a Bluetooth headset from Japanese company Adtec. The AD-HSM10 wireless headset weighs just 5g and sits in one ear. Despite its small size and weight, the specs rate it as having 3 hours talktime and 100 hours standby time.

It will cost 8980 yen (about US$79) when launched and comes with a docking station for charging. Now this is one product that requires a "keep out of reach of children" warning label just in case they swallow it.