Product features: brand new fast EXPRESS CARD 2xUSB 3.0 equipped with 2 USB 3 ports.0 for connecting devices using the latest USB 3 standard.0 installation - plug into a free EXPRESS CARD slot, backward compatibility with USB 1 devices is maintained.1 and USB 2.0 transfer rate up to 5 Gbit/s (640 MB/s) hot-plug capability thickness - 4 mm when installed in the EXPRESS CARD port looks like built-in USB ports supports systems: Windows XP and newer chip: Renesas Electronics Package includes: - EXPRESS CARD USB 3 card.0 - optional power USB cable weight: 55g Quantity pcs. in carton: 100