Question Minimum bluetooth version for the band

[keshet1]

Hello, I'm still thinking about buying the new band. But my phone does not support Bluetooth 5, what is the minimum version for Bluetooth backwards compatibility?

 

[MagicalUnicorn]

Hello, I'm still thinking about buying the new band. But my phone does not support Bluetooth 5, what is the minimum version for Bluetooth backwards compatibility?

Bluetooth 4.0 .