Apple CEO Tim Cook speaks during an Apple special event at the Yerba Buena Center for the Arts on September 12, 2012 in San Francisco, Calif.
Apple CEO Tim Cook speaks during an Apple special event at the Yerba Buena Center for the Arts on September 12, 2012 in San Francisco, Calif. - 

Apple will unveil new hardware and software at its live product announcement event on Tuesday. Eric Limer, staff writer at Gizmodo, joins Marketplace Tech host Ben Johnson to give a preview of what to expect. 

Click the audio player above to hear more. 

Follow Ben Johnson at @@TheBrockJohnson