Game Boy Advance SP
The Game Boy Advance SP Headphone Adapter allows headphones with a 3.5mm phone connector to be used on the Game Boy Advance SP. The SP lacks a standard headphone jack, so it requires the use of special headphones or an adapter for headphone functionality. This adapter connects into the "Input 2" port of the SP. The Nintendo brand adapter was only available by directly ordering it from Nintendo, though many third-party companies offered their own version with their accessory packs. This accessory also works with the original DS, however, use in this way is unnecessary because the DS already has a headphone jack.