Input: 2 X Optical,1 X Coaxial,1 X Audio. Output:1 X CEN/ SW, 1 X FL/FR,1 X SL/SR,1 X USB. Transfer the DTS/AC-3 digital signal into 5.1 * Two SPDIF input, one coaxial input, one sterero input supplying perfect solution for your HDTV player, XBOX360 etc. * Decode format:Dolby Digital EX?DTS-ES?Dolby Pro Logic II?DTS?AC3,Dolby * Package Includes: 1x 5.1 Audio Gear Decoder, 1x High Quality Optical Fiber Cable, 1x 100-240V Input/9V Output Power Adapter, 1x User Manual * Digital. S/N:120db. stereo separate degree:80db(1KHZ). Noise output frequency:200uV. Simulate output frequency:2.2V