The Belkin Pro Series USB (Universal Serial Bus) A/B Device cable is used to interface a USB device to a USB hub or Macintosh computer host. The Pro series USB Device Cable features a molded strain relief, double shielding and 24K gold plated contacts for maximum conductivity and error-free data transmission. It is constructed of the highest quality wire allowed by the USB specification and consists of 20 gauge power wires for maximizing the full potential of USB. All Belkin Pro Series USB Device Cables are rigorously tested and certified by our quality assurance engineers and are 100% fully compliant with current USB specifications and all other applicable industry standards.