Motorola has been working closely with a company called VivaInk to create Digital Tattoos, which can enable users to unlock the Moto X. Motorola has been experimental quite a lot in the device unlocking strategy. Last year, Motorola has introduced Motorola Skip, a small clip you wear that unlocks your Moto X saving your time of entering a PIN many times a day to unlock. Today, the company has released an official video about this new product in collaboration with VivaInk.
As you see in the video, this tattoo is an adhesive unit that can be applied to the skin and operates just like a NFC. Your device can be unlocked by simply holding tattoo near your device. This tattoo costs $10 and comes in pack of 10.
The tattoo is water proof but off course, it has an expected lifetime of about 5 days( varies with skin type and activity level). Hit the link below to purchase.