XBOOM Audio System with Bluetooth and Bass Blast, Dual USB, MIC and Guitar, LED Lighting, Karaoke Creator, XBOOM AppRoaring Bass You Can FeelFill your space with powerful, body-shaking bass sound. The 8" Bass Blast Woofer controls the airflow from behind the speaker to deliver room-filling sound with virtually no distortion. So the dance beats can keep on rocking.