Combination of mixer, power amplifier, cabinet, microphone It is convenient, portable and easy to operate. Universal switching power supply, more than 85% efficiency Car power adaptor for emergent use and outdoors activities(new model). Elegant & portable aluminum stand; portable plastic case for convenient move. Main Specifications: 4*2 ± two way Power: 40 watts Impedance: 4Ω Frequency response: 100Hz~20KHz SPL: 93dB Crossover frequency: 4.5KHz Power output: 40W/ 4Ω X 2 Frequency response: 20Hz~20KHz ≤ 1dB THD: 20Hz~20KHz ≤ 0.1% Equivalent input noise: ≤ -114dB Channel EQ: High 10 KHz±15 dB Low 100 Hz±15 dB Power requirements: 115VAC, 60Hz, 200VA 230VAC, 50Hz, 200VA Main feature: Stereo output (RMS )40 W/ 4Ω X 2 1/4" phone Jack MIC input connectors on each channel XLR. Stereo (GD / tape) input with level control on the panel front. (input connectors 1/4" phone jack). when the stereo signal input, microphone the signal automatically cut off. Treble bass reverb and level control on each channel. Master volume control. On the panel front. Built-in electronic reverb. Built-in DSP effect. Built-in switch power supply. High quality 60mm faders and sealed potentiometers.