1.ARC Function (Audio Return Channel): Extractor the Audio from TV to Soundbar or Amplifier. Please connect your TV HDMI(ARC) Port to Audio Adapter HDMI Output Port with HDMI Cable, then optical cable/ L/R or 3.5mm headphone to the soundbar, Speaker, home theater, A/V receivers etc. 2.192KHz Sampling Rate Achieved - It Actually Supports Sampling Rate at 32, 44.1, 48, 96 and 192 KHz, and 24-bit S/PDIF Incoming Bit Stream on Left and Right Channels. Pleasae use HDMI 1.4 cable (19+1), Please note: Need to manually adjust the volume of the speaker. TV remote cannot change audio volume, and TV remote cannot change audio volume 3.Audio Output Simultaneously - This HDMI ARC Adapter can send audio from TV (Support ARC function) to Optical/ Coxial/ 3.5mm/ L/R audio through ARC Adapter via HDMI/ARC interface and out audio simultaneously. (NOTE: It is Incompatible Dolby AC3/ Dolby Digital Plus etc., Please Set the Audio Output to PCM or LPCM before Using) 4.Widely Used: Compatible with all HDTVs with ARC function. SPDIF/Coaxial, Optical, RCA and 3.5mm headphone jack 4 output ports are available, which perfectly solves the interface compatibility problem between TV and audio system. It can be used for speakers, amplifiers, soundbars, active speakers, wired headphones and other receiving devices to provide diversified listening experience.