A truly unique product: Zhaolu D3 DAC modded and cryo treated by Cryo Parts. The DAC supports a proprietary computer interface called TG-Link, which is essentially I2S over Ethernet. It comes with a sound card with a TG-Link output, a TG-Link cable and a driver CD. The sound card appears to be quite decent in its own right. I bought this unit new directly from Cryo Parts, with the intent of building a second system around it. That project never came to fruition, and I barely used the device.