Using ExpressCards
Your computer has an ExpressCard slot.
ExpressCard supports the PCI Express and USB 2.0 serial data interfaces (supporting speeds of up to 2.5 Gbps and 480 Mbps respectively), improving speed in data transfer while conserving power usage.
The ExpressCard slot can accommodate a 54 mm (ExpressCard/54) or 34 mm (ExpressCard/34) wide ExpressCard. Typical ExpressCards support a very extensive range of applications including memory, wired and wireless communication cards, and security devices.
Shown next are the appearances of ExpressCards for your reference.
ExpressCard/54 ExpressCard/34
Expanding Your Computer