Full HD 4K 1080P HDMI Matrix 4x2 Switch Splitter EDID HIFI Matrix with IR Remote Control Audio Supports HDMI V1.4/3D/4Kx2K 30Hz IntroductionThis Matrix 4x2 can connect four high definition sources and two sinks with audio output optical or stereo simultaneously.It can easily switch or split four high definition video sources to two compatible displays or projectors.The Optical and stereo audio output can extract audio signal from output A.Attention please: 1.Please connect it with 19Pin standard HDMI Cable V1.42.HDMI Cable Length: 5m for 4K video sources, 10m for 1080P video sources ,Otherwise the signal can't be read out, thank you .(SPDIF/Toslink Audio output):This item without decoding function,it can be use as an Audio Extractor (Digital Audio Output), but it doesn't decode DolbyDigital/DTS,you need add an Spdif Audio Decoder!!!