
I use this cable with external USB sound card adapter: https://www.amazon.com/gp/product/B016CU2PEU/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 because my MacBook Air only has a headphone jack. The other options were a bit more expensive and I don't need anything fancy or heavy when I travel. Works perfectly! The cable appears to be quite rigid.

SINGING WOOD Boombox Portable Bluetooth
9 Review

Gamepad GEN GAME X3 Bluetooth, black/red
23 Review

KEiiD Wooden Retro CD Player With Bluetooth, FM Radio, USB AUX Inputs, Speakers And Adjustable Bass/Treble For Home Stereo System And Boombox
27 Review

Experience Nostalgic Music With KEiiD CD Player Retro Home Boombox: Get The Used-Like New Version For Just $99
17 Review