The difference between the three generations of Apple Bluetooth headset wired charge and wireless charge is the charging method. Wired charging is to charge the earphone by connecting it to the charging cable. You need to plug the earphone into the interface of the charging cable. Wireless charging is by placing the headset on the charging base or charging pad, using electromagnetic induction to charge, without inserting a charging cable.
Wireless charging is more convenient than wired charging, there is no need to worry about cable restrictions, just put the headset on the charging base to achieve charging. However, wireless charging may be slightly slower and requires the purchase of an additional charging dock or charging pad.