Linksys Wireless-G Broadband Router WRT54GS Basic Specs:

Get Connected--to the Internet and each other. Surf, store, stream and share. A Linksys by Cisco device is an essential part of your home network.

General Notes:
- Disconnect all wireless clients from the router during the upgrade process. Make sure no wireless clients attempt to associate with the router until the upgrade process is complete.

Installation Instructions here:
https://homedownloads.cisco.com/downloads/others/upgrade_instructions_routers,0.pdf