NFC Ring lets you unlock your door by giving it the finger

Near Field Communication (NFC) is a technology that's just oozing with potential. Though the mainstream adoption of near-field communication hasn't exactly gone as planned, that doesn't mean that NFC isn't still a fertile ground for great products. One upcoming product, the NFC Ring, is an example of the kinds of imaginative projects that could become more widespread a few years down the road.

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