iPod Touch

iPod Touch, a portable media player and Wi-Fi mobile platform designed and marketed by Apple Inc.. The product was launched on September 5, 2007 at an event called The Beat Goes On. The iPod Touch adds the multi-touch graphical user interface to the iPod line and is available with 8, 16, or 32 GB of flash memory. It includes Apple's Safari web browser and is the first iPod with wireless access to the iTunes Store. With a software update, which is sold by Apple, it also has access to Apple's App Store. The second generation iPod Touch, featuring external volume controls, a built-in speaker, a contoured back and built-in Nike+ support, was unveiled on September 9, 2008 at the Let's Rock keynote presentation.

Resource:
http://en.wikipedia.org/wiki/IPod_Touch