Behringer AB100 Instrument/Amplifier Selector Ultra-flexible 2-mode selector to switch instruments, amplifiers, effects, etc. Easily switch between two input signals to one output or vice-versa (e.g. switch between two guitars using one amplifier or two amplifiers with one guitar) Status LED for effect on/off and battery check Runs on 9 V battery or the BEHRINGER PSU-SB DC power supply (not included) High-quality components and exceptionally rugged construction ensure long life Ultra-flexible 2-mode selector to switch instruments, amplifiers, effects, etc. Easily switch between two input signals to one output or vice-versa Status LED for effect on/off and battery check Runs on 9 V battery or the BEHRINGER PSU-SB DC power supply (not included) High-quality components and exceptionally rugged construction ensure long life Easily switch between two input signals to one output or vice-versa