Tobo 4K HDMI 2.0 Audio Extractor is a high-performance 1 HDMI input and 1 HDMI output with an audio Extract Function. The Audio can be output by a 3.5mm Audio Jack, Toslink SPDIF, Coaxial, and HDMI Audio Port. It allows the user to use the existing audio Receiver to receive 4Kx2K@60Hz, HDCP 2.3 content audio. The product also supports HDMI loop out, as well as 10bits HDR(High Dynamic Range ) pass-through and ARC Function. Extract the Audio from TV to Soundbar or Amplifier. Connect your TV HDMI(ARC or ARC) Port to this Audio converter HDMI Output(ARC/ARC?Port with HDMI Cable, then connect the Optical cable or HDMI Cable or Coaxial to Amplifier or Sound Bar. (Please Note: ARC and ARC function is only available from the Optical SPDIF, Coaxial, and HDMI Audio Port.) And When you select the ARC function, Please make sure that your TV has power on the ARC function and that the HDMI CEC function is also on. (Please Note: that our HDMI Audio Extractor does not support CEC remote volume control and Power on/ off Function HDMI Audio Formats: PCM 2.0, LPCM 5.1/ 7.1, Dolby Digital, Dolby Digital plus, Dolby True HD, Dolby Atoms, DTS 5.1, DTS ES 6.1, DTS HRA, DTS HD Master, DTS: X. Support Blue-ray 24/50/60fs/HD-DVD/XVYCC. SPDIF/Coaxial Formats: LPCM2.0/5.1, Dolby Digital 2.0/5.1, DTS2.0/5.1.When USED HDMI Output ARC/ARC Function: TV ARC/ARC audio output port should Connect to TV with ARC/ARC function.