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The D-Link Xtreme N Notebook ExpressCard DWA-643 is a draft 802.11n compliant wireless client for notebook PC with available ExpressCard slots. This wireless adapter delivers much faster speeds and many times farther range than 802.11g while staying backward compatible with 802.11g and 802.11b networks. The ExpressCard interface provides much faster performance and better reliability than the legacy CardBus interface. Having an ExpressCard/34 form factor, the DWA-643 will fit into any standard ExpressCard slot.