Upgrade your sound and your experience with this TAGWOOD LS-521A Multimedia Subwoofer System 2.1 with Bluetooth, 8800W Multimedia Speaker System With Bluetooth. Youâll enjoy performance thatâs significantly better and smoother. You can access a world of entertainment at the comfort of your couch. Unique digital signal processing produces consistently clear, full sound at any volume. So youâll enjoy your favorite music, videos, and streaming content even more than before. Key Functions include Master Volume, Bass And Treble Control, Bluetooth, Fm Input, Sd Card, USB Disk and Aux.