两款Powerline Networking产品，价格不错。免运费。如果你家里需要通过电力线来传递网络信号，可以尝试。能彻底解决某个房间无线信号不好的问题。网件的这一对只有85M，但真的也够用了。

再问一下,你推荐了两个,哪个好些.希望是4ports,但它毕竟速率低了些.

85M，100M，200M和500M，以及1G的Powerline Adapter，不同速率的产品遵循不同的协议。比如200M的D-link产品和贝尔金产品都遵循协议HomePlug AV，理论上，是能混用的。当然，我用的时候感觉不好。
http://en.wikipedia.org/wiki/HomePlug

HomePlug AV
The HomePlug AV specification, which was introduced in August 2005, provides sufficient bandwidth for applications such as HDTV and VoIP. HomePlug AV offers a peak data rate of 200 Mbs at the physical layer, and about 80 Mbs at the MAC layer. HomePlug AV devices are required to coexist, and optionally to interoperate, with HomePlug 1.0 devices.
Utilizing adaptive modulation on up to 1155 OFDM sub-carriers, turbo convolution codes for error correction, two-level MAC framing with ARQ,[6] and other techniques, HomePlug AV can achieve near the theoretical maximum bandwidth across a given transmission path.[4] For security reasons, the specification includes key distribution techniques and the use of 128 bit AES encryption. Furthermore, the specification\'s adaptive techniques present inherent obstacles to eavesdropping and cyber attacks.[7][8]
Some Qualcomm Atheros-based adapters comply with the HomePlug AV specification but employ a proprietary extension that increases the PHY-rate to 500 Mbit/s primarily by using a wider spectrum.[9]