The Boss PSA-120S is a used OEM original guitar effect pedal power adapter that comes with a box. It has a voltage of 9V and a capacity of 500mA, making it suitable for powering pedals on a pedalboard. The adapter is manufactured in China and is compatible with Boss pedals.

I honestly don't know if the adapter ever was used so I am listing it as a used item.  It is very possible that it has been just sitting with my gear for a long time..lol.  Either way, it looks new, enjoy!