3x3 MIMO technology up to 450Mbps & Centrino optimized called my name! First understand this is NOT concurrent dual band. It is 2.4 OR 5Ghz, which threw me at first. Then after set up for 'N' only in 2.4 with auto channel scan, I installed inSSIDer app to check out 'competition' in the neighborhood and then also test the 5.2Ghz signal. -24db for 2.4Ghz is the strongest and steadiest signal I have ever recorded! This bears out with slick & steady streaming video of feature length films from the internet without a hiccup still using linksys wusb600n adapter to XP desktop two rooms away (including the kitchen). Switching back to my linksys wrt600n router confirmed this with signal strength down to -36db from 2.4 and -42db from 5.2Ghz. Unfortunately inSSIDer also confirmed after I switched to 5.2Ghz to test the DIR-665 that it continued to broadcast at 2.4Ghz only even though the activity light 'confirmed' it should have sent a 5.2 signal. A shame for a unit they clearly tout for 5.2Ghz preference. Never fear will see if D-link phone support is up to the challenge, then update this post!