Behringer Xenyx Control 1 USB, Studio Monitor Controller with integrated USB Audio Interface, All-in-one Master Volume controller, Source selector, Monitor switcher and Talkback box, 4 stereo inputs with independent level controls plus additional Monitor Mix input for your DAW, 3 independent and adjustable Monitor outputs to connect up to 3 sets of studio monitors, Built-in Talkback microphone with Level control for direct communication with musicians, Built-in stereo USB Audio Interface, phono preamp for direct turntable connection, 2 powerful headphone amplifiers with separate volume controls, Big, illuminated Volume knob for precise level adjustments, Convenient Mono, Mute and Dim functions, High-precision dual 12-segment LED meters with input/output source switch, "Planet Earth" switching power supply (100 - 240 V)