FireWire cable 800 9-pin connectors are part of a recent improvement to the IEEE-1394 technology, called FireWire 800 (or IEEE-1394b). | The improvement to the specification allows transfer of data at up to twice the speed of the original IEEE-1394 standard. | The 9-pin connector is a rectangle with square corners. It has 5 pin contacts on one side, and 4 pin contacts on the other. | This new connector type can be adapted to the older 4-pin and 6-pin connector. However, when adapted, the maximum transfer rate will be 400 Mbps. | This is an important cable if you have DV to Firewire Cable for Digital Camera, SLR, Machine Vision Camera etc