8 mini multi channel and 1 stereo analog mixer with power. 3 Band active EQ(HIGH,MID ,LOW). Distortion under 0.0007%(20HZ-20KHZ). Phantom power for studio condenser mics. 99 Kinds of parameter adjustable 24BIT DSP effects processor. ALT 3/4 stereo bus for added versatility. Precise 3 colors,6 band LED level display. MP3 player is compatible with multi audio format.