Model: 700253 Specification: Name: 2 Port USB 3.0 Express Card ExpressCard 34mm Hidden Adapter For Laptop Model: 700253 Material: Metal Size: 75*33*5mm Product Description: 2 Port USB 3.0 Express Card ExpressCard 34mm Hidden Adapter For Laptop Features: * Stable and reliable NEC UPD720202 chipset * Suitable for notebook computer (or contain ExpressCard Slot Computer) * It supports express card slot(34mm or 54mm),not Pcmcia(cardbus) slot. * 2 USB 3.0 specifications port * Suitable for laptop and desktop with 34mm/54mm slot * Transfer rate 5Gbps * USB series specifications (Compatible USB 1.1 Full-Speed / 2.0 High-Speed) * Super-Speed 5Gbps, High-Speed 480Mbps, full-speed * 12Mbps and low-speed 1.5Mbps data transfer rate. * Windows XP / Vista / Win 7 / 8/ Server 2008 Package Included: 1 x USB 3.0 Express Card a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a