i'll have to look it up when i get home, but i know its a/b/g because i had to turn off the a because it was interfering with my wireless security camera system. it is an old one though, maybe they don't make it any more?
looking at the netgear website they do have some dual band a/g routers, though i cant seem to find them in shops (newegg, bestbuy)
it does look like they are unavailable everywhere i check