FAQ's, Firmware, Warranty Information and more found at link below.
http://www.dlink.com/us/en/home-solutions/connect/routers/dir-628-rangebooster-n-dual-band-router (http://www.dlink.com/us/en/home-solutions/connect/routers/dir-628-rangebooster-n-dual-band-router)
(Note: If you've never been to the United States support site before, you'll be prompted to select the country, then this link will take you directly to the product page.)