Intey HDMI Audio Extractor|HDMI/MHL Audio (SPDIF+R/L) Extractor|4K ARC EDID Setting Audio Extractor|Optical Audio Output+RCA L/R Audio Converter(Black) The audio extractor is one device that can support 3D, 4K*2K, ARC and it allows the one HDMI or one MHL source input and one HDMI output connected to one HD Display (like TV or Projector) and extract the audio to one SPDIF audio out+One LR Stereo audio out. ARC Function: Without adding one extra HDMI Cable, it can reverse the audio to the AV Amplifier by HDMI Cable connection with HD TV while the HD TV receive the audio and video content. HDMI to achieve the synchronization of audio signal separation. There are ADV / 2.0CH / 5.1CH three kinds of audio mode options Set up was easy, No loss of quality, when source or sink is working, LED relative to is light. What you get: 1x Intey HDMI Audio Extractor, 1x 5V power adapter, 1x User manual and three months money back/ replacement guarantee, and one year warranty.