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. Along with the advanced wireless technology that is incorporated into the DWL-520, wide range motherboard support is assured by compliance to the latest PCI 2.2 standard interface. The DWL-520 is the solution for users and network administrators looking for the convenience offered by a wireless connection. The D-Link DWL-520 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). In Infrastructure mode, the DWL-520 can be connected to a wireless residential gateway with a broadband connection to enable wireless sharing of the High-speed Internet access. The DWL-520 can transmit data at rates of 11 Mbps, 5.5 Mbps, 2 Mbps and 1 Mbps per channel. With its detachable antenna using a reverse SMA connector, the DWL-520 has an effective range of up to 70 m for indoor use and up to 300 m in an outdoor environment. In addition, the DWL-520 supports 64/128-bit WEP (Wired Equivalent Privacy) Encryption for network security.