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About a month ago we let you know that Motorola was working with a company called VivaInk to create digital tattoos that can be used to unlock the Moto X.

Now, Motorola has made the product more official by releasing a promotional video about the tattoos.

The tattoo (non-permanent) is an adhesive unit that can be applied to the skin and used much like the way NFC is used — by holding the tattoo near your device, it will unlock it automatically. The tattoos come in packs of 10 and sell for $10. Each tattoo has an expected lifetime of five days before falling off. (Of course any contact with water will decrease that lifetime significantly.)

They’ve been available for purchase through VivaInk for the past month, but Motorola just announced it now on its blog, along with a promotional video. Check out the video below.