HE03L-4K is a 4K HDMI extender that use a cost-effective Ethernet cables to send an HDMI signal for up to 140M. Its chainable RX allows the extender to split an HDMI singal into up to 250 ones and display the signals at the same time. By pushing the built-in EDID button, you can effortlessly find the connected HDMI monitor's best resolution and correctly display the wanted video.