Wired-Up Signal booster / extension adaptor for HDMI cable Avoid audio / video signal loss due to long extended HDMI cables Save more money by using a daisy chain of shorter HDMI cables Booster support HDMI cable connection up to 150 ft / 45.72 m [thicker gauge cable required. Minimum support is 100 ft / 30.48 m]. No external or battery power needed Best alternative to expensive repeater box that requires additional power supply