Hi-Def input to two Hi-Def outputs using HDMI with Ultra HD resolution The Gefen ToolBox 1:2 Splitter for HDMI 4Kx2K distributes one Ultra Hi-Def A/V source to two Ultra HD displays simultaneously, without loss of quality or resolution. It works with any Ultra Hi-Def Hi source and supports resolutions up to 4K x 2K (3840 x 2160@30Hz). 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. FST: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.