Features: Supports AES/EBU, IEC60958, S/PDIF Supports 5.1 channel, 7.1 channel. Can be connected to 5.1 speakers Up to 48kHz sampling rate, supports 32kHz, 44.1kHz, 48kHz digital recording Sound card optical output supports 48kHz sample rate only; DTS-CD at 44.1kHz needs conversion for playback Compatible with Windows 98/ME/2000/XP/Vista/Win7/Win8 and MAC OS 9.1 (MAC supports 2-channel only) Full-duplex o stream playback and recording without using PC built-in sound card USB 2.0 backward compatible with USB 1.1 Complies with o Device Class Specification V1.0 Supports up to 12Mbps USB full-speed data transfer Color: gray Material: metal Package Contents: 1 x o Converter Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm.