TigerDirect offers the TRENDnet 802.11n Wireless USB 2.0 Adapter, model no. TEW-648UB, for $14.99. With $2.99 for shipping, that’s the lowest total price we could find by $7. This adapter features up to 150Mbps and supports 64/128-bit WEP, WPA/WPA2 security.

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