Kramer\'s AOCH is an Active Optical HDMI Cable running 4K@60Hz (4:2:0), 4K@30Hz (4:4:4), over longer distances up to 100m (328ft), in a simple and practical way. The AOCH cables are thinner, lighter and more flexible than copper or even standard optical cables. They provide transparent EDID and HDCP support without signal attenuation. They reduce the risk of EMI and RFI interference to provide a perfect solution for critical AV installations that demand the highest signal integrity.