Features: DJ & studio console mixer system multi 4-channel audio source mixing built-in Bluetooth wireless receiver FX (analog effects) & 16 bit DSP processor Direct-to-Computer connect & sound record ability LCD digital display & front panel control center rotary adjustment knobs & LED indicator lights MP3 digital Audio file compatibility USB interface: MP3 flash drive Reader/computer connection connect & stream Audio from external devices (2) 1/4'' (L/R) main outputs (2) XLR/14'' combo Audio line/microphone inputs 1/4'' mono + Stereo inputs 1/4'' send + Return inputs 1/4'' headphone jack Stereo level fader/slider output signal level indication bus audio control, sound routing pad channel source input switch independent Channel input audio configuration gain, high, Mid, low, FX/send, level, base + tone adjustment +48V phantom power control power on/off switch used for professional studio applications & on-stage Performances.