Sabrent SBT-PCA4 4-Port USB 2.0 & Firewire 1394 32-Bit PCMCIA CardBus Combo Adapter Two USB type A connector, USB 2.0 specification compliant, Open Host Controller Interface specification for USB Rev 1.0a compliant Enhanced Host Controller Interface specification for USB Rev 0.95 compliant Data transfer rate: High speed 480Mbps, Full speed 12Mbps and Low speed 1.5Mbps, External 5VDC DC jack for high current consumption devices System Requirements: Microsoft Windows 98SE/ME/2000/XP, Available PC Card (PCMCIA) type II slot. Package Content: Combo CardBus, USB Power Cable, CD driver.