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The Gefen ToolBox 1:4 Splitter for HDMI 4Kx2K distributes one high-definition A/V source to four Ultra HD displays simultaneously, without loss of quality or resolution. It works with any high-definition source and supports resolutions up to 4K x 2K (3840 x 2160 at 30 Hz). It features Fast Switching Technology, and supports HDCP, deep color, 3DTV pass-through, and lossless audio formats such as Dolby TrueHD and DTS-HD Master Audio.
Fast Switching Technology (FST) is a Gefen software implementation for HDMI products. FST was created to improve the lengthy HDMI authentication process, based on the HDMI and HDCP specifications. FST allows connecting/disconnecting or turning on/off of displays without having these activities affect other displays in the same distribution system.