As we discussed earlier this week, the 2012 range of Xperia handsets use a different 3.5mm standard which means the older Sony Ericsson headsets (including the LiveSound headset) will not work properly on the new 2012 Xperia mobiles. The Smart Headset is CTIA-compatible that means it will not only work with the new Xperia range but a whole host of other handsets as evidenced by the product page.
The Smart Headset has a LiveKey control that allows you to access certain applications on your phone by a push of the button. It is constructed from solid metal housing and has a flat tangle-free wire along with a new generation of 6mm speaker drivers and a mic that combines great quality sound in smaller package.