AirPods 3 can determine whether it is a wireless charging case by looking at the wireless charging function of the charging case.
The difference between AirPods third generation wireless charging box and wired charging box is mainly the inside of the lid of the charging box, the lid of the wireless charging box has a wireless charging coil inside, and the lid of the wired charging box has no wireless charging coil inside. In addition, the headphones, earbuds and other accessories are the same.