This is a nanotechnology concept that is installed under your skin and can check your heartrate and cholesterol levels. Its made of billions of nanotubes in the back of the arm thats 5x6cm rectangular and uses your body’s glucose and oxygen for power. Straight from the DiscoveryChannel VIDEO->
it would be great for changeable tattoos, changing your skin color, bald people could advertise for companies on their heads–
this could make it easier to cheat on tests too….