What Is The Difference Between Refurbished And Used?

Refurbished:
Refurbished electronics are products which have most often been returned to the manufacturer because it was unwanted or had some minor defect. In the case of a minor defect, the manufacturer (or 3rd party repair company) rectifies this by replacing the defective component, testing it to manufacturers specifications, and then deeming the hardware refurbished.
There is also a very good chance that the refurbished unit you receive may have never been used. It may have simply been a unit whose box was damaged or an overstock model that many retailers return to the manufacturers to make room for incoming models.
When electronics have been returned in an undamaged and fully functional (new) condition, due to legal reasons they cannot be marketed or sold as new.

Used:
Previously owned, a second hand unit that has not been tested by a technician to standard specifications.