с сайта акая:

What does “factory refurbished” mean?

In general, factory refurbished products are products that wouldn’t otherwise be sold as new, for a variety of reasons. They may have been used in field tests, used in sales displays at trade shows, or returned by a customer. As a result, factory refurbished products may come with minor blemishes.

All factory refurbished products have been cleaned, quality checked and tested. Factory refurbished products are certified at the factory as fully operational, and come with a 90-day parts and labor warranty.

не могу сказать делает ли это акай, но обычно на refurbished вещи либо клеится наклейка "factory refurbished" (либо ставится штампик - в общем маркируется как-то). думаю самый простой вариант - написать в акаевский суппорт через форму на сайте и спросить, маркируют ли они их после тестов.