Description: FITMENT: USB 6 Channel 5.1 External Sound Audio Card for PC Laptop. OS SUPPORT: For win98, for XP, for 2000, for Vista, for Win7/8. FUNCTION: record back digital and analog audio without sound card in your computer. USB SOUND IS AND USB AUDIO CONTROLLER: It supports 32KBz, 44.1khz. (which two need driver or application software support) and 48Khz sampling rate in digital recording, 48KHz sampling in digital\analog audio playbackin digital playback mode, itreceives audio stream form PC via USB interface and transmits audio data according to the AES\EBU, IEC60958, S\PDIF cnsumer interface standards. Only R L channel PCM audio in 5.1 channel can be conveyed in digital playback mode. IN ANALOG PLAYBACK MODE: it supports 6 channels codec for analog playback In digital recording mode, it receives S\PDIF digital audio input and sends back pc through USB. Three sampling rates, includes 32KHz,44.1KHz are automatically locked internally. In analog recording mode, fixed 48KHz sampling rate issupportedby analog audio recording. Specification: Product Size: 15cmx3.5cmx1.5cm/5.91inchx1.38inchx0.59inch Material: Aluminum Alloy Package Includes: 1Pc Sound Card 1Pc USB Charging Cable Note: Please allow slightly errors due to manual measurement and different monitors.