To differentiate from standard USB ports, the USB 3.0 ports are blue (as specified in the USB 3.0 hardware specification). The ports are compatible with and resemble the connector used with USB 1.1/2.0 devices, but looking closely you can see that the USB 3.0 connectors add extra conductors.
There are two external ports on the backplane of the card. While the card is certainly small enough, there is no low-profile backplane included.
For added compatibility, a 4-pin molex to SATA power adapter cable is included. As a result, you have the option of using a free molex or SATA connector for power.
It should be noted that the NEC USB 3.0 controller IC is only compatible with Windows based systems. As a result, Vantec's card is only compatible with Windows based systems. Those looking for a USB 3.0 add-in card for other systems, including Mac OS, Linux or Unix should look elsewhere.
As for USB 1.1/2.0 backwards compatibility, I tested the USB 3.0 ports with various flash cards, hard drives, keyboards, mice and printers with no problems.