Sewell USB 3.0 Expresscard, 2-Port NEC UPD720200 chipset Compliant with USB 3.0 Super-Speed (5Gbps),USB 2.0 Hi-Speed (480Mbps), USB 1.1 Low-Speed (1.5Mbps) OS Support Windows XP/Vista/7 (32-bit and 64-bit) 2 x external USB 3.0 connectors