LED Tattoo/Watch that keeps real time?

Subdermal Implant Electric Watch Tattoo: Internal Geekery

We thought that the wristwatch piercing was pretty damn intense, but anything implanted completely under your skin has got to win in the extreme category. The Subdermal Implant Watch Tattoo, also called an “electric tattoo” is a special LED screen which is implanted under your skin.

Powered by your own kinetic energy, the electric tattoo watch illuminates when you turn your wrist towards your face. And since it’s powered by your own body movements, no batteries are necessary.