https://www.belkin.com/id/p/headphone-adapter-for-ipod%C3%A2-shuffle/F8Z452.html
Headphone Adapter for iPod® Shuffle
SKU: F8Z452
Add remote and navigation controls to any iPod headset, quickly and easily. Upgrade from stock earbuds and listen to your music through your favorite headphones with the Belkin Headphone Adapter. Designed for use with the iPod classic, touch 2G, nano 4G, and shuffle 4G, this handy adapter features multifunction buttons that are built into the cord, giving you easy control over your playlists, volume, and more.