Which groundbreaking product design decision by Sony in 1979 helped the Walkman become a revolutionary portable music device?

The music industry has seen remarkable product innovations that changed how we consume music. From vinyl records to streaming services, product design has played a crucial role in shaping our listening experiences. This trivia question explores a fascinating moment in music product history that revolutionized how we engage with music on the go. Test your knowledge about this pivotal design decision!

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• The inclusion of two headphone jacks, allowing users to share music with a friend
• The implementation of Dolby noise reduction technology
• The addition of AM/FM radio functionality
• The use of rechargeable lithium batteries instead of disposable ones

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