The AR Pro II PR142 is the perfect accessory to any portable audio device. It is designed using a balanced, twisted-pair cable using 99.97% pure, oxygen free, multi-stranded copper to provide the greatest signal integrity for accurate sound reproduction. The unique gold plated, split center pin and 8-segment outer ring lowers signal resistance for enhanced sound quality. A dual-shield design (95% braid with 100% aluminum MylarŪ foil) delivers optimum isolation from EMI and RFI interference for enhanced sound purity. 3' length.