The AEC6280 2-Channel PCI BUS MASTER Ultra133 Adapter is a PCI-based ATA/133 (Ultra-ATA) controller card designed to improve storage performance by enabling faster data transfer rates for hard drives connected to the system. The adapter features two channels, allowing you to connect up to four IDE or ATA devices (e.g., hard drives, optical drives) and provides support for Ultra133 (ATA-133) speeds, which offer faster data throughput compared to older ATA standards.

In short, the AEC6280 is a hardware card that connects to the PCI slot on your computer and facilitates faster data communication with attached storage devices.