The DWL-520 from D-Link is a 802.11b PCI adaptor with data transfer rate up to 11 Mbps. It can operate in either Ad-Hoc mode (Peer-to-Peer networking without an Access Point) or Infrastructure mode (Peer-to-Peer networking using an Access Point), which brings high flexibility to your wireless network. The DWL-520 also supports high 128-bit WEP encryption to give you a secure wireless network. The adaptor has an effective range of up to 230 feet indoor and 984 feet outdoor, along with the 2.4 GHz Direct Sequence Spread Spectrum (DSSS) technology to ensure the robustness and efficiency of your data transmission.