Monoprice 102849 100-Feet HDMI Active Equalizer Extender Repeater This HDMI equalizer is use d to extend the effective length of HDMI cables up to 100ft It works by using the internal power of the HDMI bus to enhance and repeat the signal to the display Features: - Extends effective length of HDMI cables up to 100ft Uses the power of the HDMI bus to enhance and repeat the signal,Maximum data length based on gauge of wire For troubleshooting purposes, need to be using 22AWG HDMI cables which are very thick and heavy with these equalizers. They also cant use this with Active HDMI cables