It uses the aptX codec, and claims low latency, though I have noted some lip sync delay

Sony MDR-ZX750BN noise cancelling headset, LG Force, and Plantronics BackBeat GO 3; all of them operated perfectly with the Avantree and synced with the TV video and there is no lip-sync delay when I was viewing programs live and watching Blu Ray and DVD movies

no lip sync delay

Still a slight lip sync delay with

Let me say that I was worried about lip-sync delay because Bose does not use a Qualcomm chip that supports aptX low latency codec because I want to use my headphones not just for music but also watching TV, movies, and Netflix

No lip sinking.

And no lip syncing issues either.

The sound quality is very good and i don't have any lip sync delay