This 3 input to 1 output HDMI-compatible switcher has the key-press-switching function and has the inteligent function. The 3 input to 1 output HDMI-compatible switcher routes high definition 4k*2k video and digital audio from any one of the 3 sources to display unit. Three inputs accommodate the simultaneous connection of high definition video sources, such as HD player, Blu-ray player, Set Top Box, P & S3, Xbox360 etc. The output sends the high definition audio/video signals to a high definition display like HDTV. Specifications 3 HDMI1.4 inputs / 1 HDMI1.4 output. Supports 3D devices. Supports up to 4K resolutions. Supports HDCP pass-through. Supports a total TMDS throughput of 8.91Gbps max. Supports uncompressed audio such as LPCM. Supports compressed audio such as DTS Digital, Dolby Digital, DTS-HS and Dolby TrueHD. Maximum Single Link Video Range: 1920x1080 Supports 2.5Gbps/250MHz per channel, maximum bandwidth per display is 7.5Gbps Supports 12-bit Deep color per channel;