The AQUA is a lightweight headphone amplifier developed by Nexum that decompresses music files in real time as the user listens to provide higher quality audio than smartphones. It supports 24-bit/192kHz audio compared to the standard 16-bit/48kHz from phones. The portable aluminum device works with microUSB and Lightning connectors and does not require charging, allowing users to enjoy crisper sound from their headphones while on the go, at home, or anywhere else.