Have a read of this:
http://www.computershopper.co.uk/rev...-wndr3300.html
To benefit from the 5Ghz DraftN, You'll need to have DraftN adaptors on existing laptops and PC's ect to benefit from using the 5Ghz Spectrum, otherwise it's 2.4Ghz 802.11g for existing devices without the adaptors.