Buy.com offers the TP-LINK 802.11n Wireless Access Point, model no. TL-WA901ND, for $39.95. With free shipping, that’s the lowest total price we could find by $4. This device connects to your current router to give you 802.11n wireless capabilities, and can draw power over ethernet for ease of placement. It also features 300Mbps speeds and support for up to four SSIDs.

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