Nine-pin to four-pin connector FireWire 800/400 cable lets you connect a FireWire 800 device to a FireWire 400 device. It supports all the advantages of FireWire--including simultaneous connection of up to 63 devices, real-time digital audio and video transfer, peer-to-peer device connections, Plug-and-Play device installation, and hot swap capability. For apple notebooks and other FireWire devices Maximizes conductivity Easy Plug-and-Play installation Backward compatibility with existing FireWire (IEEE 1394a) devices