Most smartphone users have heard about and seen NFC technology in action. This Nickel-free Titanium NFC Ring lets folks with a compatible smartphone to unlock it, interact with digital doors, and more. Its larger antenna allows the Alpha ring to work with more devices. The ring is water resistant. It offers 144 bytes in storage capacity.
The Alpha ring can be used with any NFC enabled device. You can also use it to interact with your Raspberry Pi and Arduino creations. This particular ring sets you back £34.99.