<p>Netgear&#39;s XAVN2001 supports integrated Wireless N (<a href="http://open-nandra.com/?url=802-11n-wireless-network-818281" data-component="link" data-source="inlineLink" data-type="internalLink" data-ordinal="1">802.11n</a>) Wi-Fi. It&#39;s relatively small size - 4.41 x 2.91 x 1.77 inches (11.2 x 7.4 x 4.5 cm) - relative to other products in this category is convenient when needing to plug into wall outlets near to the floor or in cramped areas. One of the unit&#39;s LED&#39;s indicates the signal quality of a connected adapter, helping to compare the performance of different wall outlets. The unit also incorporates energy-saving features, part of the Netgear Green family of products.</p>The TL-WPA281 supports integrated Wireless N. It measures 6.6 x 3.6 x 5.5 inches (16.7 x 9.1 x 14.0 cm). Although some sites classify the TL-WPA281 as a 300 Mbps device, this refers to the 802.11n link speed and not to the powerline link speed, which is the standard 200 Mbps for HomePlug AV.The PLW400 supports Wireless N Wi-Fi. It&#39;s relatively large size - 3.3 x 9.5 x 6.3 inches – can be a disadvantage. Some online reviewers have complained about the quality of the product documentation.