Syba SY-EXPC34-4U 4-port USB 2.0 Express Card Fully compliant with Express Card Specification 1.0. ExpressCard/34 Form Factor Module. Hot-swapping feature allows connecting or disconnecting devices without powering down system. Fully supports EHCI and OHCI Compliant standards. Compliant with Universal Serial Bus Specification revision 2.0. Provides four external USB 2.0 high speed port.