MULTI INPUTS and OUTPUTS:This mixer not only could use bluetooth connectivity but also via USB.The USB audio Interface easily controls pc/flash drive reader.Multiple XLR/1/4" combo audio LINE/mic inputs, 1/4" (6. 35mm) mono/stereo input and 1pair 1/4" AUX/EFFECT output4 CHANNEL: This mixer has 4-channel, 1 XLR microphone, 1/4’’ INSERT and LINE mic inputs in channel 1/2. The INSERT inputs provides the ability to mix microphone audio and instrument like guitar/piano/keyboard. It features all kinds of sound files very simplily to transport in this DJ mixerBLUETOOTH COMPATIBLE: Hassle and cable-free audio to stream directly to the console unit. Mix all audios music from your smartphone to your DJ session. This audio mixer also allows you to wirelessly stream music tunes from Pandora/SpotifyINDEPENDENT AUDIO CONFIGURATION DESIGN: It has an LCD digital display w/ ID3 tag readout that displays song title/artist. Also quipped w/ rotary knobs and LED indicator lights to easily adjust the gain, high, low, fx/send, pan tone of each channel,with reliable +48V PHANTOM POWERULTRA-THIN and RUGGED CHASSIS:With only 1.3 inches thin design, sealed rotary controls to resist dust and grime, great experience of touching to use this mixer. This compact mixer provides total dynamic control, gives the audience high quality stage audio performance, premium quality crystal clear studio level quality musical playback.