Apple unveils 'thinnest iPod yet'
The fourth generation Nano was launched at a US press conference by Apple chief Steve Jobs, who announced new shuffle and library features.
He also listed the Nano's environmental credentials, including arsenic-free glass and a mercury and PVC-free body that is "highly recyclable".
Mr Jobs said the new Nano also had a "shake to shuffle" mode, which sends the gadget to shuffle mode with the flick of a wrist.
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