FireWire Cable 800 9pin connectors are part of a recent improvement to the IEEE1394 technology, called FireWire 800 (or IEEE1394b). The improvement to the specification allows transfer of data at up to twice the speed of the original IEEE1394 standard. The 9pin 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 4pin and 6pin connector. However, when adapted, the maximum transfer rate will be 400 Mbps. your first option for connecting Lacie portable hard drive. It is also an ideal cable to connecting firewire to usb port. Some Professional DC Camera require extra power during data transfer. you may enable battery power mode in your DC Camera via setting to allow the data transfer. This product come with Lifetime Guarantee.