Hi,
Ive got sennheiser mm-400x headphones which im unable to connect with my Fenix 5 plus. The watch finds tgem but fails to connect. Also tried connecting to my bluetooth speakers (Jamo DS4 and also some sony speakers) - no success. I know, the speakers are not headphones but I guess they should connect just fine too?
Today i however tested connecting my friends Sony headset and it worked just fine
Can it be that my sennheiser headphones are simply too old and the watch doesnt support them? They are around five years old but I wouldnt want to purchase new ones since they work perfect with my phone and even support aptx.