<http://schema.org/alternativeHeadline>
"It's a wireless headphone face-off: Here, we compare Harman Kardon's BT Headphones and SMS Audio's Sync by 50."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.details.com/story/cool-thing-of-the-week-harman-kardon-bt-headphones>