The MobileBroadbandDC HSPA 3G Mobile driver is a piece of software that allows a computer to interface with a mobile broadband modem or mobile hotspot device, specifically one that supports HSPA (High-Speed Packet Access) for 3G cellular connectivity. These types of devices allow your computer to access mobile internet through a cellular network, typically using a USB dongle, a built-in modem, or a mobile hotspot.

The MobileBroadbandDC part of the name indicates that it's a mobile broadband device compatible with DirectConnect (DC) technology for efficient data transfer, and it uses HSPA technology, which is a 3G standard that provides faster data speeds than older technologies like GPRS or EDGE.