Behringer MPA30BT, Active Speaker with Bluetooth, Built-in 30 W amplifier, Equipped with: 1x 6"" Woofer, Battery operation possible for up to 20 hours, Combo input, AUX input for external CD player, 35 mm stand flange, Weight: 4.9 kg, Compatible microphones: Article Nr #384418# or Nr #399132# (both not included)