With the Nexum AQUA + you can listen to high-resolution audio files on the go. The amplifier supports sound quality up to a 32 bit depth and a 384 kHz sampling rate. This allows you to enjoy music with the highest sound quality. Through this amplifier you also use headphones with a high impedance in the bus or train. You plug a headset into the AQUA +. Via Bluetooth you connect your phone or tablet to the amplifier. Then this device transmits the sound through the cable to the headphones. With the included charger you can charge the amplifier easily wirelessly. The 8-hour battery life lets you listen to high-resolution music files all day long.