This is an Insignia NS-AC1200 Universal AC Adapter.
It is black in color, with input 100-120V and 7 output options: 3V, 4.5V, 6V, 7.5V, 9V, 12V, USB output 5V.
This charger measures approximately 2.25" by 4.5" by 1.25". Its cord measures 60" long.
The item comes in pre-owned condition but is untested and sold as-is.