How to recognize refurbished grade

Grade A

Clean appearance with the same as a new product with no scratch.

Grade B

There are some minor scratches, but the scratches can be erased through isopropyl alcohol or plastic gloss.

Grade C

When you touch the surface with your fingers, you can feel a deep scratch or visible scratch appearance.

Grade D

The following issues cannot be fixed. Fake, Broken surface, Bottom mesh part failure, Deep scratch, Flooding, Product failure (Not a battery problem) such as Microphone breakdown, Blinking green color in the charging case alarm, Low and high speaker volume issues, AirPod Pro noise canceling issues, etc.