Features: High-performance audio amplifierl,support switch- noise reduction;Support automatic signal mute- function This HDMI-compatible- Audio Return Channel Adapter can transmit audio from TV of support eARC function to optical,coaxial,3.5mm audio and HDMI-compatible- only of adapter via HDMI-compatible-ARC / eARC interface, and output simultaneously It can perfectly solves problems of having no audio output interface that TV cannot be connected- to the sound system-. Supports the audio separation of PCM, 7.1CH Lpcm, DTS-, AC3-, Dolby-panorama and other audio in the input HDMI-HD signal and outputs from optical fiber, 3.5mm and 'HDMI-compatible- AUDIO Only' output ports. Support SPDIF output; Support Coaxial output Support 3.5mm stereo- headphone output Support HDMI-Audio only 7.1CH output Specifications: Model:HD371 Material:Plastic Adapter Types: UK/ EU/ AU/ US (Optional) Support SPDIF output; Support Coaxial output Support 3.5mm stereo- headphone output Support HDMI-Audio only 7.1CH output Support transmission of 192KHz audio sampling rate Optical fiber coaxial interface supports 5.1 channel transmission ARC-/eARC and 3.5mm headphone output volume can be controlled by TV (CEC) Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measur Package includes: 1PC x HD371 Audio Extractor 1PC x 5V1A Adapter (optional) 1PC x USB power cable 1PC x Optical audio cable 1PC x 3.5 Audio cable