In analog playback mode, supports 6 channels of analog playback software. In digital recording mode, receives SPDIF digital o input and sends it back to the PC via USB. Compatible with laptop operating systems: Windows 98SE / ME / 2000 / XP / 7 / OS 9.1 (version supports 2-channel playback only). Enables full-duplex o playback and recording on any PC. In digital playback mode, receives o streaming from PC via USB interface and transmits o data according to IEC60958, S/PDIF interface standards. Supports 32kHz, 44.1kHz, and 48kHz sampling frequencies in digital recording; 48kHz sampling frequency in digital and analog o playback. (Controller or software application support required.) Color: Blue Material: Metal Size: 89 x 69 x 21 mm Package Contents: 1 x 5.1 / 7.1 Surround Sound Card 1 x USB Cable Note: The package includes only the items listed above. Other products are not included. Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.