It uses an A4-size piece of piezoelectric film in a T-shirt to absorb pressure from sound waves. It converts these into an electrical charge, which it then transfers from its battery into a lead that fits most phones.
它的内部置有一张A4大小的压电式薄膜，可以从声波中吸收一定的压强。这些压强被压成电流输出，通过专门的充电线，电流从T恤内部的蓄电池中转入到各种型号的手机电池中。