02:30Walking With Headphones: How the Walkman Conquered the WorldBBC Radio 4 Extra Duration: 30 minutes Thu 12th Jun 2014, 02:30 on BBC Radio 4 ExtraComedian Steve Punt meets people who simply would not leave home without their personal stereo. Why the devotion? From April 2004.GenresFactualScience & NatureScience & TechnologyFormatsDocumentaries Source: BBC Online