iPod shuffle 4th generation with 4GB storage capacity. Produced in August 2010. Perhaps a prototype? : r/AppleCollecting
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iPod Shuffle Archives - 9to5Mac
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Identify your iPod model - Apple Support
Apple's New iPod Shuffle: The First Invisible MP3 Player
iPod shuffle - Simple English Wikipedia, the free encyclopedia
Apple iPod Shuffle 4th Generation 2GB - Blue, B - CeX (AU): - Buy, Sell, Donate
Apple IPod Shuffle 4th Generation Space Gray (2 GB) for sale online | eBay