This is a high-performance, multi-functional HD audio extractor, this extractor can extract the audio signal among the HD signal to the power amplifier system to obtain high-quality audio effects which is hard for TV speaker to achieve. Features: It has a 3.5mm audio port which can transport audio and video at the same time. Attached Micro-USB cable provides additional power for devices with low-power output. Convert 1 HD Input to 1 HD + 1 Audio (SPDIF) Output+ 3.5mm Analog Audio Output.HD achieves the synchronization of audio signal separation. There are 2.0CH/ 5.1CH two kinds of audio mode options.LED clearly indicates the working state of the Extractor. Multi-functional HDMI Audio Extractor - Convert 1 HDMI input to 1 HDMI output + 1 audio (SPDIF) output + 3.5mm analog audio output, supports 4K x 2K - 3D. (Note: Please connect 5V/1A power supply before using. Refer to the images for the details) LED Indicator - LED clearly indicate the working sate of the extractor. No extra special adapter needed, just connect to the 5V/1A USB plug or power supply with the USB cable. Two Audio Mode Options 2.0CH/5.1CH - Optical toslink output supports 5.1CH & 2.0CH mode, 3.5mm stereo audio output support 2.0CH mode (NOTE: If the input source is NOT the 5.1 CH, SPDIF output & 3.5mm audio output will output 2.0CH audio signal). HDCP V1.4, UHD 4K & 3D - Input resolution up to 3840x2160@30Hz:4096x2160@30Hz Support 24bits/deep color 30bit,36bit video color format. High compatibility - Perfectly for various HDMI source devices like Roku or Chrome-cast without dedicated audio output as well as Blu-ray/ DVD/ HD player, satellite box, HD TV, Apple TV, PS3/4, Xbox, PC/Laptop, HD camera, HD DVR etc.