I plugged the jack 3.5 branch of my TV, I did not notice any lag between the audio and image, but my TV manages the PCM support, I do not know if it's at it. For account the volume of the audio is reduced, I do not know if this is due to a sound security.
The Syllable E3 is small in size, the 3.5 jack cable is short, it measures about 18 cm between the two ends.
I think overall it's a good product, it's to do with time.