So i bought this bluetooth receiver to use it in my car (bmw 645)
I had only cd changer, so i upgraded aux and put this in the transmitter.
The sound quality is awesome and the connection stable.
I tried out the phone function, the mic is very good but i use it only to hear music.
The only thing is, that my 12v plug only works with ignition on, so i cant hearing muaic if the car isnt on. A small built in battery were very usefull.
all in all a very good bluetooth aux receiver