The LINDY Fire Wire 800 Active Extension Cable means that you can extend the cable length of your Fire Wire 800 devices by an extra 5m. ideal to be used with DV Camcorders, printers, scanners, cameras etc. To use, simply plug one end of the Active Extension Cable into a Fire Wire 800 port on your computer & then plug the cable from your device into the other end. For longer distances you can connect up to 10 Extension Cables together for a maximum length of 50m!