I did a little research. I was wrong. Here is the scoop on the various versions of Bluetooth:
Bluetooth v2.1 simplified and streamlined the pairing procedure back in 2007, which headphones definitely do take advantage of. Later Bluetooth versions improved power handling and power saving functionality, which may affect attributes such as range and connectivity, but anything specified v2.1 or newer should be equivalent as far as audio quality is concerned.
Bluetooth v2.1 simplified and streamlined the pairing procedure back in 2007, which headphones definitely do take advantage of. Later Bluetooth versions improved power handling and power saving functionality, which may affect attributes such as range and connectivity, but anything specified v2.1 or newer should be equivalent as far as audio quality is concerned.