5.3.
Bluetooth is currently a public application more a setting, whether it is the transmission of large files, listening to music, car, etc., all need the help of Bluetooth, and the development of 23 years of Bluetooth technology, but also ushered in a new 5.3 version.
Compared to the previous generation version of Bluetooth, this version improves the periodic broadcasting, connection updates and channel grading in Bluetooth Low Energy, further improving the communication efficiency and wireless co-existence of Bluetooth devices, and version 5.3 also introduces new features for BR\/EDR security.