HDTV Supplys WolfPack 4K 66 Foot WolfPack Active Optical Cable is a high performance, low power consumption and low cost HDMI cable. The WolfPack Active Optical Cable uses optical fiber to replace some of the copper wire as a high-speed signal transmission medium. This WolfPack Active Optical Cable can perfectly transmit a 4k@60HZ UHD image up to 20-meters or 66-feet. Compared with the traditional HDMI copper wire cables, these WolfPack Active Optical Cables go further, are smaller, have a better signal quality together with flawless perfect EMI/EMC immunity. Compared with other HDMI optical fiber transmission solutions our WolfPack Active Optical Cable is easy to use, has perfect HDCP 2.2 compatibility and doesn't need an external power supply.