Finally, you can make good use of available USB upstream ports on your PC, and free-up the parallel port for devices like your Zip drive. Use the USB to Centronics 36 male adapter cable to attach your legacy IEEE 1284 bi-directional printer, and forget the hassles of IRQ sharing. That's the beauty of USB. Choose the transparent adapter cable to match your new iMac! The Lastar USB to Parallel adapter cables are fully compliant with the USB specification ver. 1.1, and support standard PC parallel port register based operation. They auto negotiate hardware recognition for faster protocol set-up, and support multiple logical channels. Maximum throughput is 1.216m bytes/sec. (ECP mode), and they come complete with a PC driver disk for common printers. Also, included is a 1 meter USB A/B cable.