AQUA is the world's only battery-free amplifier especially designed for headphones. Through MicroUSB, USB Type C and iOS Lightning, AQUA connects directly to mobile devices such as phones and tablets. With its stylish design, it's your best friend for high quality music. It allows you to have awesome listening experience anytime, anywhere. Listening to music has become an indispensable part of life. Never is there a shortage of people saving up to buy pricy headphones, just to enjoy clarity and high quality music. The price of those high-end headphones, however, isn't usually friendly or affordable. Do you really have to spend so much money to enjoy quality music?