9 signal source inputs（3×HDMI / COXIAL / OPTICAL / PC-USB / U disk-USB / AUX / BT-5.0 Receiver）.You can switch different signal sources randomy by Button or Remote. The BT-5.0 Receiver,The transmission distance is up to 15m.100 level volume adjustment, more delicate sound quality. All signal source(HDMI/ARC/COX/OPT/PC-USB/AUX/U disk-USB/BT-5.0) can decode to 5.1ch output,it is audio decoder system. Except for U disk all signal sources (HDMI/ARC/COX/OPT/PC-USB/AUX/BT-5.0) can convert to COXIAL/OPTICAL output.it is S/PDIF Switcher system. Support 192Khz/24Bit playing.If the audio signal source is 5.1ch then the hardware decodes (real 5.1). if the audio signal source is 2.0 then Software decoding (virtual 5.1).