This little USB gadget is one of the finest inventions for setting up and using computer networks. It couldn't be simpler to use with just any Linksys wireless router. It looks like a thumb drive - very small and compact. It takes up less than a couple of square inches on your desktop. It has no moving parts, so require no maintenance, and no replacement. Just plug it into a USB port and your operating system will usually automatically set up a network for you. I have my wife and daughter on our network using two of these. Perfectly legal and saves lots of money. Pay for ONE ISP and three of us can use the internet all at the same time. It's fabulous, and it'svery affordable. Available just about anywhere at retail stores or on the web, including eBay, at very reasonable prices. I can't say enough positive things about this little gadget. The only caviat is that ostensibly someone with ulterior motives outside your computer area could intercept signals. This could be a potential problem when using your computer for financial transactions or other sensitive work. Linksys is a very reputable company with that makes top-rated computer equipment. I don't believe you can go wrong using this piece of equipment. I strongly recommend this item to anyone who wants to set up a small computer network.