The only difference between the two versions of Huawei freebuds4 is that the unlimited version supports wireless charging and wired charging, and the wired version only supports wired charging.
Huawei freebuds4 can charge the charging case with a USB-C charger. The headphone battery has a capacity of 30 mah and the charging case has a capacity of 410 mah.
Huawei FreeBuds 4 supports dual connection with mobile phones, tablets, PCS, watches, smart screens and other devices in Huawei all-scene devices. It also supports dual connection with smart devices of Android, iOS and Windows systems, and truly supports simultaneous connection with smart devices of two different systems and different brands, bidding farewell to the annoyance of switching back and forth of multiple devices and improving connection efficiency.