Mixer The Q mini Usb mixer features high quality microphone preamps and offers gain and pan control for each channel2 band EQ for each channel allows perfect management of your soundDSP effects for channels 1 and 22 Stereo Output 1 4 inch jacksRCA Aux in and out2 XLR microphone inputs2 line inputs 2 mono channels plus 1 stereoThe mixer can be powered by a power bank In this case however reading from a USB flash drive will not work but bluetooth will work insteadTo use a USB flash drive as an MP3 player it will be required to use the included power supply unit