Functional ring

Wearable tech that can open the door to your house.
NFCring1

 

U.K.-based John McLear has got this wearable-tech thing wrapped around his finger. He’s developed an NFC Ring, a metal band with two near-field communication chips built-in, one for private information and one for public. The ring makes it possible to access a smartphone without needing to type in your pin number, unlock a door by pressing your palm to a sensor or exchange your contact details with that good-looker at a bar by simply pressing the ring to their phone (you should probably ask first).

via Fast Company