The Rane <b>Black & Blue</b> is a simple, mono input-selector/mixer/amplifier with 3 discreet channels of Bluetooth&reg;, 3.5mm line input, and USB computer link for playback or recording. Inputs can be selected for monitoring individually, or all inputs mixed at once.</p><p><strong><em>PLEASE NOTE:</strong> Bluetooth&reg; range is affected by walls, obstructions and movement. For optimal performance, place the product in a location that is unobstructed by walls, furniture, etc.</em></p><p><strong><ins>Applications</ins></strong><br />Meeting Rooms (Bluetooth&reg; A headworn mic, computer program through USB, XLR line out to powered speakers). Unit in mixer mode for mixing sources.</p><p>Coffee Bar (Bluetooth&reg; A mobile device, Bluetooth&reg; B is TV audio, Bluetooth&reg; C is barista headworn mic for calling orders...amplifier out to full-range speakers and XLR out to subwoofer). Unit in mixer mode for mixing sources.</p><p>Trade Show (Bluetooth&reg; A is tablet streaming music, Bluetooth&reg; B is presenter headworn mic...XLR out to powered speaker, and USB out streams to laptop computer to record the presentation). Unit in mixer mode for mixing sources.</p>