USB External 6 Channel 5.1 S/PDIF Optical Sound Card Audio For Netbook Laptop PC

Optical in (AES/EBU, IEC60958, S/PDIF). Optical out (AES/EBU, IEC60958, S/PDIF). You can also use the box for inputs, it has two 3.5mm jacks, one for a microphone and another line in. Not only that but you can use an optical in to get the best out of digital signals.