Features: 4-channel mixing console with mono MIC balanced LINE inputs, supports power amplifier function(250W * 2). Each channel has TRIM, 2-band EQ(HI LOW), SEND EFFECT, PAN control knobs and volume control faders. The PEL switch allow you to monitor the channel that the PEL is turned ON only. Ultra-low noise discrete Mic preamp with +48V phantom power. With USB input interface that can connect the computer or USB interface player. Built-in 16 kinds of LCD display digital effects and 5-band graphic equalizer. With 4 speaker outputs(L-A/B R-A/B) and 2 main XLR outputs (L R).