" The basis of the 2x4-inch "Digital Tattoo Interface" is a Bluetooth device made of thin, flexible silicon and silicone. It´s inserted through a small incision as a tightly rolled tube, and then it unfurls beneath the skin to align between skin and muscle. Through the same incision, two small tubes on the device are attached to an artery and a vein to allow the blood to flow to a coin-sized blood fuel cell that converts glucose and oxygen to electricity. After blood flows in from the artery to the fuel cell, it flows out again through the vein. "
When the phone rings, for example, an individual turns the display on, and "the tattoo comes to life as a digital video of the caller," Mielke explains. When the call ends, the tattoo disappears.
WOAH, having a phone tattooed into your arm is pretty cool but being able to make the tattoo disappear whenever you feel like it as well makes it ridiculously cool. If you read the whole article, it says that it could help with health risks because it continuously monitors your blood and its just plain cool never having to have to find your phone again. lol