USB2.0 4 Ports ExpressCard Features: - Fully Compliant with ExpressCard specification 1.0 - ExpressCard/34 Form Factor Module - Hot-swapping feature allows to connect or disconnect devices without powering down system - Fully supports EHCI and OHCI Compliant standards - Compliant with Universal Serial Bus specification revision 2.0 - Provides four external USB2.0 high speed ports - Supports windows 2000 or above