Antenna extension cable for devices with coax connection, 3 layers of screening, tin-plated, copper-modulated HP oxygen-free copper conductor, S-OFC special wires with a coaxial structure, ferrite filters, 24K hard gold-plated plug, multiple protection, PE foam insulator and triple high-density total shield to completely eliminate interference, screening rate 100 dB, for HDTV, 30 year warranty