Summary: A Wifi Amplifier basically. The 3"x3"x1.5" device does an effective job of boosting an existing signal (at least -80db/m) to a usable level in an area that would otherwise not pickup a viable signal. By placing the Wifi Booster in an area with an acceptable signal, it's range may be extended up to 100', based on my experience, depending on your environment.
Excerpt: So far we've been very happy with the wifi booster product. Our bedroom used to have a very weak signal from our router in the living room. Since installing the booster (really easy setup) there has been no more loss of connection.
Excerpt: I purchased this product because I kept getting kicked off my home network. I have a big house with a lot of walls and that was the apparent reason for the problem. Set up of the unit was pretty straight forward, even with a DSL router. I was able to extend the range about another 30 feet, which was all I really needed for optimum use of the unit.
Excerpt: With my current Wireless Router on the North end of my house, there were several areas, both downstairs and upstairs that failed to get good Wi-Fi coverage on the South side. I bought one of these units to try and see if I could overcome the lack of coverage. I opted for the manual setup, since the "push button" set up didn't work. The steps were staight forward and easy to follow.
Excerpt: Great value at the sale price (half off) but otherwise I might step up to the Apple Airport Express as with that you don't have to create a second SSID. While this acts as a wireless extender, and does a good job, the Apple model lets you basically clone your existing WIFI network, so you don't have to have a second SSID (like MyNetwork_ext) so you can just connect transparently.