The Zoook Rocker Thunder XXL 70 watts Trolley Karaoke System is one of the most powerful and user friendly karaoke systems on the market. It is perfect for those who love to sing and entertain others. The system includes a 12" subwoofer and 1" tweeter, professional echo control, bass and treble control, FM + USB + TF+ Aux + BT + TWS, and a wireless microphone. The system also comes with a trolley so you can easily move it from room to room. The Zoook Rocker Thunder XXL 70 watts Trolley Karaoke System is the perfect way to liven up any party or gathering.