This board provides connectors for USB-A, USB-B, IEEE 1394 4-circuit, IEEE 1394 6-circuit, DVI-Digital, and DVI- Integrated connectors. The IEEE 1394 style is also known as "Firewire" (a trademark of Apple Computer). Each board contains two USB and two 1394 connectors offering a backup connector on each board. Both 1394 connectors are right-angle types so cables would be connected from the left side of one board to the right side of the other. The DVI-I connector ("Digital Visual Interface") will also accept the DVI-Analog cable connector. All connectors on this board are female (PCB-mounted male versions are not made), and all standard cables are usually offered with male connectors at both ends. If you must test a male-to-female extension cable, use a male-to-male cable in series as a gender changer. A side view showing the right angle connectors appears below the top-view photo. Set of two boards.