USB Stick-Sized Digital-to-Analog Converter,

Plays all music files: MP3 to high-res
Compatible with Apple and Windows PCs, as well as iOS and Android mobile devices (requires Apple Camera Adapter or Made for Android/OTG adaptor)
Drives headphones directly
Fixed output feeds preamp or AV receiver
Asynchronous transfer ensures digital timing integrity
High output (2.1 volts) drives almost all headphones, including power-hungry models
32-bit ESS 9016 DAC with minimum-phase filter
Bit-perfect digital volume control