In analog playback mode, supports 6 channels of analog playback software.In the digital recording mode, it receives SPDIF digital audio input and sends it back to the PC via USB.Laptop OS support for: Win98SE / ME / 2000 / XP / 7 / OS 9.1 ( version has only 2 channels to play).Add full-duplex audio playback/recording on any PC or .In digital play mode, receive audio streaming PC via USB interface and transmit audio data according to / , IEC60958, S/PDIF interface standards.Supports 32kbz, 44kHz. (Both of which need controller or software application support) and 48 kHz sampling frequency in digital recording, 48 kHz sampling in digital analog audio playback.Colour:BlueMaterial:MetalSize:89x69x21mmPackage Contents:1 * 5.1 / 7.1 Surround Sound Card1 * USB CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.