This is the latest released 4 x 2 Hi-Fi HDMI matrix in July 2014. Access to four HDMI sinks with stereo audio output using four HDMI sources. Allows four HDMI devices to be switched or split easily to two HDMI compatible monitors or projectors. Each of the HDMI outputs is with audio output by SPDIF or by 3.5mm stereo audio output. Offers solution for noise space and security concerns data center control information distribution conference room presentation school and corporate training environments. Features : Support 3D With HDMI-CEC function. Support deep color 30bit 36bit 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 15 metres AWG26 HDMI standard cable length Output up to 25 metres AWG26 cable length Inputs can be switched with the IR remote control also can be controlled by two buttons. By remote the optical audio output format can be switched to Stereo Sound or DTS-HD/Dobby-trueHD/LPCM7.1/DTS/DOLBY-AC3/DSD; Hi-Fi audio format is decided by the source film. It can smartly jump over those input sources which are not connected. it can come back to the default the input 1 status when restarted or reset. LED Indicate: when one source device or sink display device is working the LED relative will come to light; when one source is selected to any sinkthe LED relative to the source will come to light. No loss of quality Installs in minutes Need DC5V/2A power supply Specifications : HDMI resolution: 24/50/60fs/1080p/1080i/720p/576p/576i/480p/480i Support video color format: 24bit/deep color 30bit36bit Support audio format: DTS-HD/Dolby-trueHD/LPCM7.1/DTS/Dolby-AC3/DSD Audio output: SPDIF and COAX Max transmission bandwidth: 225MHz Max baud rate: 6.75Gbps Input/Output TMDS signal: 0.5~1.5Volts p-p Input/Output DDC signal: 5Volts p-p (TTL) Input cable distance: ≤15m AWG26 HDMI standard cable Output cable distance: ≤25m AWG26 HDMI standard cable Max working current: 900mA Power adapter format: Input:AC (50HZ 60HZ) 100V-240V; Output: DC5V/2A Operating temperature range: -15~55'C; Operating humidity range: 5 to 90%RH (No Condensation)