2.0 portable active karaoke bluetooth speaker/2.0 trolley speaker for stage&amp;party&amp;concert<br>Bluetooth function,built-in bluetooth module, make your connection with most bluetooth devices<br>Built-in battery, rechargeable<br>USB slot,SD/TF, FM radio function, 3.5mm Aux<br>100% MDF wood with 30watts to support you powerful sound quality<br>professional design with competitive price