![Dug up my old CE-IV mp3 player. Runs off a AAA battery, but manual said there was an optional AC adaptor. Anyone know what kind of port this is on the left? ( Dug up my old CE-IV mp3 player. Runs off a AAA battery, but manual said there was an optional AC adaptor. Anyone know what kind of port this is on the left? (](https://external-preview.redd.it/XrrDr4raQPxHdhGEwpatWUUNUfpGNv28NOCPodWboe8.jpg?width=640&crop=smart&auto=webp&s=110943add99dc8353e00f68250bb39809c07c53f)
Dug up my old CE-IV mp3 player. Runs off a AAA battery, but manual said there was an optional AC adaptor. Anyone know what kind of port this is on the left? (
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