HDMI Power inserter cable. Replacement for HDMI to USB cord included with Cleerline SSF™ 8K UHD HDMI active optical cables. External power is only required if embedded power is < 5V. If Source or Display cannot provide adequate embedded 5V power, external power supply is required.  Place HDMI to USB cord inline at Source/Tx or Display/Rx. Connect USB to external 5V power supply.