Apple has revealed its fifth generation iPod touch featuring a 4-inch Retina display with a thinner, lighter, taller design with a variety of colours and the introduction of Siri.

The new iPod touch is the thinnest generation ever, at just 6.1mm, and weighs just 88 grams.It has a 4in Retina display, and is made from anodized aluminium. It comes in a range of colours: pink, yellow, blue, white & silver, black & slate.

The new iPod touch is available in two models: a 32GB model for £249 and a 64GB model costing £329. Apple is taking pre-orders from Friday 14 September and the device will be available in October.

The new iPod touch has an A5 processor with dual-core, and dual-core graphics that boosts graphics by up to seven times over the A4 processor.

Apple has given the iPod touch an iSight camera for the first time. It is 5-megapixels and has autofocus and an LED flash. It also has a sapphire crystal lens cover, and the same Panorama feature introduced with the iPhone 5.

The new iPod touch also has an improved front camera for HD FaceTime.

Apple has brought AirPlay Mirroring to the new iPod touch too.

The iPod touch runs iOS 6, Apple's latest mobile operating system, and even gets Siri, Apple's voice-assistant that was introduced with the iPhone 4S.

According to Apple, the better graphics and bigger display hasn't meant a sacrifice of battery life. The company boasts 40 hours of music playback and up to eight hours of video playback for the new touch.

“With over 350 million sold, iPod is the world’s most popular and beloved music player,” said Philip Schiller, Apple’s senior vice president of Worldwide Marketing. “Music lovers may have a difficult time deciding between the reinvented iPod nano, the thinnest iPod ever, and the all-new iPod touch with its stunning 4-inch Retina display, 5 megapixel iSight camera and ultra-thin design—both in beautiful new colours.”

The iPod touch will ship with new earphones, called EarPods. Apple says it spent three years designing the new headphones.

A new Loop accessory is also included. It's a wrist strap that aims to prevent users from dropping the iPod. A 

The new iPod touch and nano are set to be released in October.

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