<http://schema.org/image>
<http://rack.1.mshcdn.com/media/ZgkyMDEyLzEyLzA0LzQ0L2hvd3RvY2hhbmdlLmM1Ni5qcGcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/199098ae/400/how-to-change-the-function-of-your-iphone-s-volume-buttons-edf366376d.jpg>
<http://mashable.com/2012/09/04/volume-buttons-functionality/>