http://www.broadcom.com/products/Wir...b=features-tab
Simultaneous dual-band operation provides data rates of up to 300 Mbps in both the 2.4 GHz and 5 GHz bands
Worldwide DFS certification to provide 27 channels in the 5 GHz band.
Weird some info that's not a dual band router, cause the chipset supports it and its exactly the same used on WRT6XX thats officially a 'dual band'.
But its confirmed it only works at 2.4GHZ.