Route two input signal to two outputs. Each input signal has independent level control. Separate footswitches allow you to engage/mute each input source as needed. When using ONLY output A, both input signals are combined. When using BOTH A & B output channels, each input is routed to its own output destination. For guitar, bass, keys, or dozens of other reason only you can think up! Equipped with dual input level controls. One 9V battery or optional 9V adapter required for LED indication only. Cold-rolled steel housing, quick clip battery door and two-year warranty. Features include: · Route two input signals to two output sources · Each input has an independent LEVEL control for best mix of both inputs · Footswitches let you select or combine inputs as needed · LEDs show you which input is active · Jack configuration allows combination or separation of input signals · Unit is active and buffered. One 9-volt battery or 9V adapter is required for operation · Cold-rolled steel housing, LED indication, quick clip battery door and two-year warranty