Elite Acoustics A4-8 MK II Acoustic Amplifier, Battery Operated Acoustic Amplifier, Improved version, Bluetooth audio streaming, Integrated, rechargeable LiFePO4 battery with status display, Approx. 4 to 6 hours of playtime with a full charge, With digital effects and mix and mastering functions, 4 Channels, Power: 80 watts, Equipment: 1 x 8"" loudspeaker and 1"" silk dome tweeter, Housing construction: bass reflex, Control channel 1/2: EFX Send Level, Gain, Notch Filter, Frequency & EQ (Channel 1 EQ includes Mid Frequency), Control channel 3/4: Level, EFX Send Level, Master controls: Volume, Equalizer (Low, Mid, High knob), Effect Mix, Decay / Rate & Effects, Switch: Mute Switch - Phase - Pad, Effects: Reverb - Echo - Chorus - Flanger, Connections: CH1 / 2 input (XLR type & 6.3 mm jack) - CH3 / 4: Left / Right stereo input (6.3 mm TRS jack) - AUX in: (mini jack) - XLR output, Class D bi-amp, 35 mm Loudspeaker flange at the bottom, Dimensions (W x D x H): 230 x 230 x 370 mm, Weight: 10.9 kg, Colour: Black, Matching cover: Art.#429381# (not included in delivery)