Apple airport express

How does this work? Can I use it to extend my wireless routers range?. Does it need to be hooked up directly to an ethernet cable?. I have higher end router but I am still only getting two bars because my house is somewhat large.

If you use a WFA router it works even better.

 Make sure to set the WFA key on your router.

Well its pretty secure for the most part. Make sure you update to the latest WFA I heard it helps with spyware and forum navigation Phone Post

All airports now have free WFA Internet Phone Post