look what i have found
https://www.aliexpress.com/store/pr...pter-For-SE535-UE900/1825606_32955022313.html
this is what i was hoping for for a long time (not really fully wireless like this, it would have been also ok if there was a wire between the two)
basically i wanted the housing behind the ears, because its just frustrated to have this hanging down on each side or worse on only one side. every time you turn your head the side with the housing pull the cable down so you end up with no cable on the other side and the next turn rips the headphone of the "no housing" side from your ear.
end even if you have the housing on both sides, its still **** to use it in the gym. every time you lay down to bench press you still have to adjust the headphones because you end up ripping them from your ears while laying down
and i also don't want the mini fully wireless headphones because of the sound quality, battery time and because they are more heavy they can also fall out and because there is no cable to hold it, it drops on the floor (and when you are on the go in the city or so, you may even lose them this way)
so this TRN BT20 receiver/cable looks good for this kind of things because they cant fall out and you don't have to adjust the cable.
the only question is now which chipset was used, the old CSR8670 (CSR8675) or the new QCC5100 series. the new QCC5100 series should have much better battery live.
i have asked NiceHCK about that
this kind of bluetooth receiver would be perfect wireless setup for people like us, who value good sound quality
EDIT: now i have asked every seller of TRN BT20 on aliexpress