This a Macbook Air 13" with official magsafe charger. It was our personal device that has been well taken care of.  It has been used in the home and not transported to school or other locations. The mag safe power adapter is in normal working condition but does show some discoloration.  With a plastic shell protective cover we have been able to prevent scratches and dents that would be typical of a unit of this age.  By using only the home the devices has not been dropped and the corners are undamaged.  The screen, keyboard, track pad and the ports have all been working properly. We don't use the Thundberbolt connection but there is no reason for it not to work. The battery does hold a charge and works sufficient for light use (word processing, web browsing) for many hours but won't provide an "all day" life.  Big Sur is pre-installed on this unit. Please ask questions if needed. More pictures or details can be provided if necessary.