Remarks: to get 5.1CH, the video source must be 5.1CH and your audio system must be capable of decoding 5.1 signal. This UHD HD audio extractor lets you separate stereo audio from your HD video signal and connect it to 3.5mm audio devices, such as your stereo sound system or desktop speakers. You can also extract the audio from the HD signal and integrate it into an optical application. 2CH and 5.1CH HD Audio Extractor This digital audio decoder support LPCM 2CH, Dobly Digital 2/5.1CH, DTS 2/5.1CH(5.1CH audio via coaxial port only) 4K Ready With the latest multimedia chipset, this HD audio converter can easily handle resolutions up to 4K/30Hz. It supports 4K@30Hz in&out(pass-through only, no scaling capability). With pure hardware design, you can easily connect your latest HDMI sources such as a blue DVD player, TV to your 4K-capable HDTV while enjoying quality audio from your audio system. Description This UHD HD audio extractor lets you separate stereo audio from your HDMI video signal and connect it to 3.5mm audio devices, such as your stereo sound system or desktop speakers. You can also extract the audio from the HD signal and integrate it into an optical TOSLINK application. Features & Specifications: 1. OUT: This slot is where you connect the HDTV or monitor with an HD cable for input source display. 2. OPTICAL: This slot is where you connect to the audio amplifier with an optical fiber cable. 3. R/L: Analog audio output. 4. DC 5V IN: Plug the 5V DC power supply into the unit and connect the adapter to the AC wall outlet. Package Contents: Audio Converter X1 Micro USB Cable X1 User Manual X1