The Dell Wireless 5630 (EVDO-HSPA) Mobile Broadband Mini-Card is a device that enables mobile broadband connectivity on your laptop using the EVDO (Evolution Data Optimized) and HSPA (High-Speed Packet Access) technologies, which are commonly used for 3G mobile networks. This card allows your computer to connect to the internet using a mobile carrier's cellular network, much like a mobile hotspot or smartphone tethering, but in a more integrated form directly within your laptop.

The USB Composite Device term indicates that the card may use a USB interface and, as such, can show up as a composite device in Windows, meaning it has multiple functionalities (like a modem and a network interface) that may require multiple drivers.