What is a characteristic of the ExpressCard /54 form factor?

The ExpressCard /54 form factor is specifically characterized by its connector width of 54mm. This width allows it to accommodate various expansion cards used in laptops, which can enhance functionality by providing additional ports or features. The /54 designation directly indicates the 54mm width at the connector, distinguishing it from the other variant, ExpressCard /34, which is 34mm wide. Understanding this specification is important for ensuring compatibility with respective devices and knowing what kind of expansion options are available for a laptop. The ExpressCard format provides a direct interface for hardware expansion, with the /54 version supporting more complex cards that might require additional space.