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StarTech.com 115 ft. (35 m) 4K HDMI Extender - HDMI Extender - Up To 4K60 - Amplifier/Booster - HDMI to HDMI Booster (HDBOOST4K) , BlackUse this repeater to amplify your 4K HDMI signal and extend it 30 ft. using a standard HDMI cable. This 4K HDMI signal booster lets you increase the signal strength of your HDMI video source so it can travel greate..