This A/B box will allow you to choose between two amps on the fly, take your guitar tuner out of your signal chain, choose between two guitars with no unplugging of cables or mute your guitar instantly, for example. The dual color (red/green) LED lets you know if your using A or B. This pedal is passive but requires standard 9V DC Negative power for the LED to function.
Brand reference number:JHSABB
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