The Linksys Dual-Band Wireless A+B PC Card Adapter lets your notebook communicate with today's wireless network standard, and prepares you for the future. With one PC Card, you can connect with the 2.4GHz, 802.11b wireless networks so prevalent in homes, businesses and public "Hot Spots" already, and also a growing number of 5GHz, 802.11a networks that are spreading fast. ??It's simple to use. Just pop it into a PC Card slot, and run the included Setup Wizard which will walk you through the configuration. To keep your communications secure, the Dual-Band card supports up to 152-bit data encryption. ??802.11b wireless networks are commonly found in corporate environments, and are used in homes for household Internet connectivity without the need for running cables. They're also popping up all over the country in coffee shops, airports, hotels, convention centers, and other public spaces offering "on the go" connectivity to mobile users. The 802.11a standard is almost 5 times faster ...