1.Three external IEEE 1394 (FireWire) ports support DV camcorders, hard disk, removable drives, scanners, printers and other 1394 audio/video devices including TV, VCR, DVD with data transfer rates up to 400Mb/s.2.Supports both PC and Mac.3.Works with Sony, Panasonic, Cannon, Sharp, JVC and many other DV camcorders for digital video creating/editing.