Monoprice 15-Feet 9 PIN/ 9PIN BETA FireWire 800, FireWire 800 Cable, Clear (100336) FireWire 800 (FireWire 1394b) is the new version of the popular FireWire interface BETA refers to the FireWire 800 9 pin connector which is called a "beta connector" It doubles the throughput of the original IEEE-1394a FireWire interface from 400Mbps to 800Mbps