This is a 3V fixed-voltage MyVolts-branded power supply adaptor designed to meet exactly the power specification of your Sony MZ-N707 Minidisc player.
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myVolts 3V power supply for Sony MZ-N510, NH-900 Minidisc player
myVolts 3V power supply for Sony Minidisc MZ-R900 Minidisc player
myVolts 3V power supply for Sony AC-E30HG, AC-E30A PSU part
myVolts 3V power supply for Sony MZ-R70 Minidisc player
