The section on latency really needs to be elaborated on. What dongle are users supposed to use? I bought these and it seems as though the claimed 20ms latency needs LE audio/LC3 codec, and RTINGS seems to agree with this. AptX adaptive has a noticeable latency closer to 100ms. Did Sennheiser say what dongle to use? Their own BTD600 does not support LC3, and the only LC3 capable dongle on Amazon seems very sketchy.