The SoundExtreme 8" Subwoofer with EcoCast automatically wireless connects with your SoundExtreme soundbar speaker to enhance your audio experience. 500 watts of power concentrated bass output from 20 to 300 Hz. Enriched and Powerful Bass will thump your ride to a new level. LED lights which sync to music. Gain and Filter controls. Remote Gain switch to easily adjust the volume. Automatic selective turn on mode. Aux input / Sub in audio input connect to any brand soundbar or stereo.