Contents of Sale:
Panasonic SJ-MJ75 MiniDisc player (blue). Quantity 1. Used.
* Player only. No other items, batteries, or accessories are included in the sale *
** This sale does not include any way of powering the device. Unless otherwise stated, this device requires a special kind of rechargeable 'gumstick' battery that is inserted into the device. Please either ensure you are familiar with this requirement in advance, or reach out to us if you are unsure. **

Summary:
Tested and functional. Minor callouts regarding the appearance.

Product Condition (Appearance):
Front Face : A few feint marks. Some worn paint on the central disc section.
Sides : No callouts.
Rear Face : A few feint marks.
Internal Battery Compartment : No callouts.
All external facing screws present and tightened.

Product Condition (Functionality):
Tested and functional.
See test results and photographs for detail.

Device:
Panasonic SJ-MJ75

Power Via Rechargeable Gumstick Battery : OK *** Rechargeable gumstick battery is not included in the sale ***
Power Via External AA Battery Case : OK *** External AA battery case is not included in the sale ***

Audio Playback : OK - Played more than two hours of audio with no issues
Audio Output : OK

Play / Stop : OK
Next Track : OK
Previous Track : OK
Hold : OK
Volume Up : OK
Volume Down : OK

Disc Insert : OK
Disc Eject : OK

Product Information:
Released in December 1999, the Panasonic SJ-MJ75 is dedicated to disc playback, and does not have disc recording functionality.
Due to its age it does not support MDLP.
Panasonic claimed that it would deliver up to 21 hours of playback from a gumstick battery.
It features a magnesium body, making it very light. At the time of release it was the lightest portable MD player in the world.
It weighs 61 grams without a battery or disc installed. 
It has a 3.5 mm headphone jack for audio output.

Hopefully this information is clear and covers everything you need, but don't hesitate to reach out if you have any questions.