There are five different versions of it.
There are five different versions of it.
The first version was called 1.1, which was followed by 1.2, 2.0 plus EDR, 3.0 plus HB and version 4. They are backwards-compatible with Bluetooth devices.
The first version was called 1.1, which was followed by 1.2, 2.0 plus EDR, 3.0 plus HB and version 4. They are backwards-compatible with Bluetooth devices.