400 Mbps High speed digital interface for IEEE1394 components. High grade 99.99% OFC (Oxygen Free Copper) conductor for high-resolution digital data transmission. Twisted-pair construction for improved music reproduction and maximum noise reduction. Dual conductive shields protect signal quality with superior coverage 24k gold-plated contacts for error-free data transfer and ultra-low impedance Environmentally safe design eliminating hazardous materials such as cadmium or lead.