'ReNEWeD / Refurbished / Ex-Display' is just a generic term used to describe something that can’t quite be sold as brand new. In most cases it’s just an item that has been returned after a change of mind, maybe after stern words from their better half when they got home. Usually the only sign is a slightly marked box.
They may have a small fault that is then rectified. They may have been used. Whatever the reason, these items are then individually checked by the manufacturer, warrantied and supplied with all original accessories. But, for the lucky buyers it means BIG SAVINGS!