The 4x2 Matrix can connect four HD Source with two HD Display, which can also do extra audio output by the SPDIF port or Headphone port. It can switch or distribute the four HD Source to the two HD Display easily. The matrix also can support ARC function, which can upstream the TV audio to the amplifier. One HDMI Input support MHL/HDMI double mode input, the other three HDMI input support only HDMI single mode input. The output A support extra audio output by SPDIF port and 3.5mm Headphone Port. HDMI to achieve the synchronization of audio signal separation. There are AUDIO PATH/ 2.0CH / 5.1CH three kinds of audio mode options Support Full HD 1080P, Full 3D Support 4K*2K resolutionlOne HDMI Input support MHL/HDMI double mode input, the other three HDMI input support only HDMI single mode input. The output A support extra audio output by SPDIF port and 3.5mm Headphone Port. HDMI to achieve the synchronization of audio signal separation. There are AUDIO PATH/ 2.0CH / 5.1CH three kinds of audio mode options Support Full HD 1080P, Full 3D Support 4K*2K resolution Support deep color 30bit, 36bit, 48bit Support Blue-Ray 24/50/60fs/HD-DVD/xvYCC Digital audio format, as DTS-HD/Dolby-trueHD/LPCM7.1/DTS/Dolby-AC3/DSD Support signal retiming Support input up to 15metres AWG24 HDMI standard cable length, output up to 25metres AWG24 cable length Inputs can be switched with the IR remote control,also can be controlled by two switch buttons. MHL port supports the RCP function, it can do control to the smart phone and the switcher by the TV remote. MHL/HDMI working in dual mode, can reduce the number of ports The SPDIF audio output format can be chose by pressing the switch key or the remote. It can come back to the default the input 1 status when restarted or reset. Led Status Light allow the user to know the working status easily. No loss of quality Installs in minutes Need DC5V/2A power supply