The video site is as follows: https://youtu.be/E6j_bAcf1Kw?feature=shared This is a repaired item, and all functions have been confirmed. The aging drive belt has been replaced with a new one made by a domestic manufacturer. It is in good working condition and can still be used for a long time. One belt and one counter belt have been replaced. Good working condition, and has been fully maintained. Cassette playback, recording/playback, fast forward/rewind, and cue/review operations have all been confirmed to work normally. Reverse switches to side B instantly. ● Built-in speaker: Clear sound quality. ● Earphone jack (mono): Also clear, with pleasant bass. Operates on 2 AA batteries. External power supply 3V operation confirmed. - Recording/playback 2x mode: ○ - VOR voice-activated recording: ○ - Speed control: ○ - DC IN 3V: ○ - Counter mechanism: ○ - No unusual noises. Only the pleasant operating sound unique to tape recorders.