Small size, BIG power! A high resolution 384Khz / 32bits digital-to-analogue converter (DAC) with USB input that will dramatically improve the sound quality of all your digital sources. It is also designed to work as a DDC, routing signal to S/PDIF output. It can be partnered with 3 kinds of power supply – wall adapter (comes with the package), optional KingRex U Power and optional KingRex PSU MK2 (7.5V version). Asynchronous transfer mode decreases jitter distortion.