The Pearstone HDMI Female to HDMI Female Coupler connects two male-end cables to extend the total length of the HDMI signal. The coupler supports ultra-fast HDMI speeds, and supports advanced features such as: Audio Return Channel, 3D content, and ultra-high resolution of 4K. It is also ready for use as part of an HDMI over Ethernet network. The coupler features 24k gold-plated connectors, for cleaner transmission and corrosion resistance.