iPod touch 4

歴史的背景

Apple unveiled the fourth generation iPod Touch on September 1, 2010. It includes a front-facing camera for FaceTime, the iPhone 4's Retina display without an IPS screen, support for recording 720p video and 960 x 720 still photos via a back camera, Apple's A4 chip, a built-in microphone, and a 3-axis gyroscope. On October 12, 2011, the iPod Touch fourth generation began shipping with iOS 5.0 pre-installed for PC-free activation. Also, an additional color option, white, was made available. On September 12, 2012, the 8 GB model was replaced with a new 16 GB size as the base model, the 32 GB model was reduced in price, and the 64 GB model was discontinued in favor of the fifth generation models.