Product Operation: Serviced and Working】 The belt has been replaced with a new one, so you can continue to use the Walkman with peace of mind for a long time. After servicing, the belt has been replaced with a new one, and operation has been confirmed with two AAA batteries. 6-month warranty. The playback sound is clear, with no noticeable noise, and it is possible to play and record with very good sound. Playback, stop, fast forward, rewind, and auto-reverse (inversion) have been tested for long periods of operation and there are no problems. There are no signs of battery leakage, and the battery terminals are clean and in a beautiful condition. The pinch rollers show no dents or deterioration and maintain their original rubber performance. The playback speed of FWD and REV is stable, and the speed difference has been confirmed to be within an acceptable range. The speed adjustment function and 2x speed playback mode have also been confirmed to be working. There is no sound fluctuation, and the results of wow and flutter measurement were also good. Recording tests with the built-in microphone were also problem-free, and each operation button and switch button functions normally. The volume control can be adjusted smoothly without any scratchy noise. Operation of the original remote control and sound output through the earphones are also good. It is also equipped with a 3.5mm standard earphone jack, so you can enjoy it with commercially available earphones.