1.HDMI ARC Function The HDMI ARC Audio Return Adapter connects to the TV's HDMI ARC port and s the audio signal of the TV to the soundbar, amplifier system, stereo headphones, home theater and other devices through optical, coaxial, R/L stereo and 3.5 audio interfaces, eliminating the problem of TVs without audio output interfaces that are not connected to the audio system. Note: The TV must have ARC function and HDMI ARC port. TVs without ARC function cannot use the ARC input of this product. 2.192KHz DAC Audio Adapter: The SDKA803 audio adapter supports sampling rates of 8KHz, 96KHz and 192KHz as well as 24bit S/PDIF input bit streams on the left and right channels. It can maintain clarity, fineness and no obvious distortion or noise, allowing users to immerse themselves in a highquality listening experience. (Please use an AGW26 standard 19 1 core HDMI cable or a higher standard cable) 3.Synchronous Audio Output The HDMI ARC adapter can output audio from HDMI(ARC), Optical TOSLINK SPDIF and coaxial interfaces to Optical TOSLINK SPDIF, Coaxial and RCA (L/R) 3.5mm audio ports through a DAC audio converter, and can output audio signals at the same time. Before using RCA (L/R) and 3.5 mm stereo headphone socket, please set the audio output of the TV to PCM or LPCM, whose volume can be controlled via the TV (CEC). Note: CEC only applies to devices and HDMI cables with HDMI version 1.4 or above. 4.SPDIF to Coaxial Bidirectional Converter: SPDIF (Toslink/Optical) to Coaxial, Coaxial to SPDIF (Toslink/Optical); At the same time, the optical and coaxial interfaces of the HDMI ARC audio adapter support 5.1CH and 2.0CH outputs. 5.Wide Compatibility The ARC adapter is compatible with all HDTVs that support ARC (such as Sony TVs, Samsung TVs, LG TVs, Fire TVs, Roku TVs, etc.), Bluray DVD TV boxes, game consoles PS3/PS4, Xbox stereo headphones, soundbar, home theater systems and other devices. You only need an HDMI cable that supports ARC to easily create a home theater. Note: The adapter must be connected to the HDMI ARC port of the HDTV, and the adapter switch should be switched to 'ON'. The ARC function of the HDTV must be turned on (can be operated via remote control).