Boost your HDMI Signal. Connects the end of a long HDMI cable or used to chain two cables together, creating a longer HDMI extension. Works by generating the high-definition video and digital audio received from the source and transmits it along to the second cable at the extended display. Supports exceptionally long cable runs up to 164 ft. Superior resolution up to 1080P. Backwards compatible with DVI enabled devices. Small compact design for the a clean system set-up. Fully compatible with HDCP compliant devices.