If you look at the picture, you can see model number. WRT54G2. These are Good stable routers. Firmware can be changed to the DD-WRT, BUT has to be the MICRO version. (AMAZING firmware I may add!)
http://support.linksys.com/en-us/support/routers/WRT54G2 - adding this would have been nice too so people can look at details. Would also be nice to see the item and not just the box.