The M2Tech hiFace USB interface from Italy has been conceived to obtain the highest quality digital audio signal using a PC or MAC. hiFace input format is a data stream signal with sampling frequency/resolution up to 192kHz/24bits, available from a PC or MAC USB port. A very high quality S/PDIF stereo audio output signal is available from hiFace for your Hi-Fi system DAC (Digital to Analog Converter). HiFace looks like a small USB pendrive, featuring a very compact size. Internal very low jitter oscillators and proprietary drivers allow for playing 192kHz/24bits audio files that feature the best signal quality.
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"Listening to Reference Recordings’ 24/176 WAV of Tchaikovsky’s Hopak from Mazeppa was unlike anything I have heard before...I heard a far more realistic sense of space especially in image depth and placement. The frequency extremes displayed greater extension and articulation. While more extended, the highs were also silkier and more natural and open while bass was deeper, more defined and propulsive...In the few years since I started reviewing, I cannot think of another product that offered so much for so little. If you have a DAC regardless of input options and contemplate getting into computer-based audio, a hiFace would be a terrific place to start."

6moons.com