FireWire 800 (IEEE1394) 9 Pin Male to 400 (IEEE1394b) 6 Pin Male Compatible with standard 6-pin FW400 cables to connect to all new devices with FireWire 800 port (including Apple MacBooks, iMac, Mac Mini, hard drives, PCs and camcorders) Fully compatible with Apple Mac and PC FW800 - IEEE 1394 compliant and bi-directional, works in both directions: 400 to 800 and 800 to 400 Allows simultaneous use of adjacent ports This product is fully IEEE 1394 and RoHS compliant This product can be used to convert FireWire 800 to FireWire 400. which has a 9-pin connector that plugs into the FireWire 800 port of the computer. At the other end of the adapter is a 6 pin FireWire socket. Any standard 6-pin FireWire 400 cable can be connected. Therefore, it is very convenient for users who use Mac. This product can be used to convert FireWire 800 to FireWire 400. which has a 9-pin connector that plugs into the FireWire 800 port of the computer. At the other end of the adapter is a 6 pin FireWire socket. Any standard 6-pin FireWire 400 cable can be connected. Therefore, it is very convenient for users who use Mac.