Generic 808 #26 1080P Full HD Car Keychain Camera Voice Video DVR Looping Driving Recorder In digital recording mode, it receives S\PDIF digital audio input and sends back to PC through USB. Three sampling rates, includes 32KHz,44.1KHz are automatically locked internally. In analog recording mode, fixed 48KHz sampling rate insupportably analog audio recording. Package Content: 1 x USB 5.1 Ch optical Controller Audio Sound Card S\PDIF 1 x CD driver 1 x USB cable