Wi-Fi defense from OTO Software just could not be easier. I put the CD in, ran the install, set it up, and then thought “I wonder if I should look at the instructions.” Actually there is no instructions other than - put in the CD and start the installation. It is just so simple to use, if you have any experience with computers you can probably figure it out. The 802.11b wireless networking signal will typically go out about 100 feet or more with no interference. You know those pesky walls just keep getting in the way and shortening the distance it can go. Well the manufacturers have an answer for that in the new devices that are out. The signal on new 802.11g is suppose to be up to 300 feet. The new 802.11n in prerelease by Belkin and others have a range of up to 400 feet.