Featuresr adopt high performance linux operating system and audio decoder chip support dtsac 3r one key switch for 51 or 21 channel output 2 spdif optical input 1 coaxial input 1 stereo inputr aux input port connect to any group of lpcm stereo signals such as computer audio mp3mp4 player audior automatically detect ac 3 dts lpcm digital audio signalr high compatibility support network player hdtv blu ray dvd dvd for ps3 for xbox 360 dm500s dm800hd etcr r offe