This Linksys Wireless G PCI Adapter with SpeedBooster WMP54GS, ver 4.1, with an antenna is a great addition to your computer system. It is compatible with PCI ports and has a maximum data rate of 54 Mbps. The wireless external interface makes connecting to the internet a breeze and its form factor is perfect for a desktop computer setup. This adapter is designed to provide seamless connectivity and high-speed internet access, making it an ideal choice for both personal and professional use.