https://x.com/ObsoleteSony/status/1824702704641249615?t=pbfV2_YZIDrP8kWI8lFNrA&s=09

In 1987, Sony introduced the Walkman WM-51, which featured permanently attached headphones that could be wound and stored within the device. It had auto-reverse, Dolby B NR, and supported various tape types.