Channels USB Portable Mixer bluetooth Live studio audio 48V phantom power. - for:applicable to the family KTV, Stage tuning,network host,radio broadcasting,Sound recording etc. Featureff1a* Perfect tuning ability Adjustment:Gain; Medium/High/Bass; Reverberation; Volume* Simple design, lightweight and convenient, impact resistant powder sprayed metal housing, more resistant to fall, low noise, more durable.* 4 Channels Input:2-Channel monophonic microphone/line channel input, 1 group stereophonic input, with balanced time XLR type microphone input socket, is a high-quality microphone amplifier.*The ability of tuning is complete, with medium pitch, bass, reverberation and volume adjustment function.* 1 groups of main channel input, 1 groups of auxiliary channel output and return interface.* 1-Channel independent