A:Answer The rear speakers are wireless for the sound signal. They pair and link automatically during the set up and re-link each time when the main bar is powered up. The speakers do require 120 VAC power.
The system overall is pretty good. It does a good job with Dolby and movies. Base and surround sound is good. It does not make dialogue more distinct on day to day TV watching short of just plain turning up the volume.
My only complaint is that to set up the system, you have to set up an account, log into Google Home, download a Google app and allow the unit to use your WiFi - ostensibly to be able to use Alexa. If however you later block the bar units' access to WiFi on your router (it identifies itself as a Chrome-cast speaker), you can block Alexa but then the blue tooth function stop working. You will then be unable to play music from your phone etc. through the speakers which is one of the features I really liked. Not clear why BT needs WiFi other than for Google's benefit.
There are two manuals you can download from the LG site - a "Simple Manual", pretty useless and an "Owners Manual" that provides good detail on the setup and operation.
