Tech developers are looking into methods that would allow temporary tattoos to perform an assortment of different functions. The first is a tattoo that would transform your body’s sweat into useable power for other tech devices, such as a smartphone, smartwatch or fitness tracker. This capability is being developed by professionals at the University of California, San Diego, and operates by measuring the lactate in your sweat. The tattoo would then store the electrons in the lactate, which generate an electrical charge, prospectively turning you into your own power source.

This is only the tip of the tech-tattoo iceberg. These tattoos can also contain magnets that transmit sound, which makes a tech tattoo affixed to the ear area a potential wireless set of ear buds.