Keywords: ht3189, one side sound, as9s
If you found the sound only coming from one side of the headphone, please:
1) Ensure the audio cable connecting the transmitter and your TV/audio source is FULLY plugged at BOTH ends.
2) Plug and unplug the audio cable to the aux/3.5mm port on headphone 2-3 times.
If you still experience one side sound, then contact firstname.lastname@example.org for free replacement pls.