Antenna extension cable for devices with coax connection, 4 layers of screening, high-quality silver-plated, copper-modulated OFC wire (99,99% Cu), S-OFC special wires with a coaxial structure, ferrite filters, 24-karat hard gold-plated solid metal plugs, triple protection, PE foam insulator and quadruple high-density total shield to completely eliminate interference, screening rate 120 dB, for HDTV, 30 year warranty