never come across any devices not even computers which supported that, even bluetooth and audio from the speakers don't work on computers, also bluetooth a2dp is notorious for not supporting any type of sync audio features so 2 speakers could depending on the quality of the components and the audio filtering they applied have a somewhat big delay between them, heck even just 1 bluetooth headset or speakers can easy be very out of sync with the visuals if you watch a movie and there is nothing one can do unless the player support adding a delay to one or the other