The D-Link DWL-G520 B3 is a wireless network adapter card designed for desktop computers. It is part of the D-Link AirPlus G series and supports the 802.11g wireless standard, providing data transfer rates of up to 54 Mbps. The DWL-G520 B3 utilizes a PCI interface, allowing it to be installed directly into a desktop computer's PCI slot. It offers WPA and WPA2 encryption for secure wireless connections, and it is compatible with both Windows and Linux operating systems. The D-Link DWL-G520 B3 is a reliable and cost-effective solution for adding wireless connectivity to desktop computers, enabling seamless and convenient access to wireless networks.