Sabrent 2-Port ExpressCard SuperSpeed USB 3.0 Express Card Adapter for Laptop WITH POWER ADAPTER (CX-U32C) Provides 2 ports, compatible with all USB 3.0, 2.0, and 1.1 compatible devices. Can power a single high-power USB 3.0 device with supplemental power cord (included) Upgrade your laptop to SuperSpeed USB 3.0 via any available ExpressCard slot Hot-Swapping Feature Allows to Connect/Disconnect Devices without Powering Down the System Fully compliant with USB 3.0 revision 1 and Intel xHCI rev 0.96 specifications Supports Windows 7, Vista, and XP (32 and 64 bit).