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 play mode, receives o streaming from PC via USB interface and transmits o data according to IEC60958 and S/PDIF interface standards. Supports sampling frequencies of 32kHz, 44.1kHz, and 48kHz for digital recording and analog o playback (requires controller or software application support). Color: Blue. Material: Metal. Size: 89x69x21mm. Package includes: 1 x 5.1 / 7.1 Surround Sound Card, 1 x USB Cable. Content limited to items listed; other products not included. Note: Lighting and display differences may cause slight color variations between image and actual item. Measurement may vary by +/- 1-3cm.