SONY CD Walkman D-NE820 CD playback confirmed while the adapter is plugged in. Other functions not tested. The earphones were used for operational check and are included as a bonus. The cord is partially damaged. Please note that this item is several decades old, and its operation is not guaranteed. Also, please understand that this is a used item and may have minor scratches and some dirt. Slight discoloration on the white back. Please check all photos. I'm not sure how to use it, but the yellow part on the adapter can be removed, and it works either way. See photo 17. I'll include the batteries, but I don't know if they work. #jinyou audio I am also listing other items.