3.5mm Headphone Audio Cable for the Nintendo Gameboy Advanced SP

Plug and play. Easy to use. Simple attach the cable into your handheld and then into your headphones and you are good to go. Enable your GBA SP to use a standard headphone jack to get full stereo sound.

Set of 3 GBA SP Cables Compatible with Nintendo Game Boy Advance SP Includes USB Charger Cable & 2 Player Link Cable & Headphone Adapter 3.5mm Jack Cord : Video Games

3.5mm Headphone Adapter Cable for Nintendo Gameboy Advance SP – SupremeGameGear

Game Boy Advance SP: USB-C Kit - The giltesa's shop

50pcs Replacement 3.5mm Headset Jack Adapter Adaptor Cord Headphone line Cable for Nintendo Gameboy Advance GBA SP - AliExpress

3.5mm Jack Headphone Earphone Adapter Cable Cord For Game Boy Advanced GBA SP

Remember that time Nintendo got rid of the headphone jack?

USB-C Mod for Game Boy Advance (Audio supported) from The giltesa's shop on Tindie

Headphone adapter for Game Boy Advance SP 3.5mm - black

BoxyPixel Unhinged IPS V2, USB-C port and headphone audio jack mods : r/ Gameboy