D-Link Air DWL-520 Wireless PCI Adapter(rev.E):The D-Link air DWL-520 is an IEEE 802.11b, Wi-Fi compatible wireless PCI adapter. The DWL-520 provides an integrated PCI solution that will operate within the 2.4 GHz Direct Sequence Spread Spectrum (DSSS) for wireless networks in the home or office environment. The D-Link DWL-520 can operate in either Ad-Hoc mode (Wireless Peer-to-Peer networking without an access point) or Infrastructure mode (Wireless Peer-to-Peer networking using an access point). In addition, the DWL-520 supports 64/128-bit WEP (Wired Equivalent Privacy) Encryption for network security.