The Anchor Audio BEA2-U4 is a Beacon portable sound system with built-in Bluetooth & two dual wireless mic receivers. The Speaker Reaches crowds of 2,500+ with its 120 dB of clear sound and powerful 150W AC and 125W DC modes. The built-in rechargeable batteries operate 6 - 8 hours on a single charge. The lightweight array tower has eight 4" neodymium speakers and the base has three 8" neodymium subwoofers.