The StarTech.com CB2EC ExpressCard to PCMCIA Adapter Card converts a laptop port into a PCMCIA CardBus port. With it, you can use older CardBus cards and newer ExpressCards without the expense of having to replace your existing cards for the sake of compatibility. The PCMCIA adapter card is ideal for use with Ethernet LAN, broadband and modem connections. It is easy to set up and no driver or software is required for installation or operation. This ExpressCard adapter supports operating systems such as Windows XP, Vista and Mac OS X. With this item you can enjoy faster speeds and better connectivity with your equipment.