SONY MD WALKMAN MZ-1 Operation confirmed with AC adapter connected. Disc ejection is not smooth. Playback works sometimes, and sometimes errors occur. There are signs of battery leakage. An AC adapter is included, but it is a third-party product, so please consider it as an extra. It is a 10V AC adapter, compared to the original 10.5V. If you are concerned, please refrain from using it. Due to the above, this item is being sold as junk. For those who can perform maintenance at their own risk, or for those seeking it as a collector's item, we would appreciate your consideration with no claims and no returns. Since it can read and play sometimes, I believe there is a high possibility that it will stabilize with cleaning. - Brand: SONY - Model Name: MD WALKMAN MZ-1 - Function: Disc Loading Mechanism - Operation Buttons: Multi-function buttons Thank you for viewing.