The BigShot I/O's onboard Trim and variable level for Input-2 ensure the level of your instruments can be exactly matched or dialed to taste. Flip the Tuner Out switch, and you'll enjoy constant monitoring of your tuning without affecting your signal.
And the BigShot I/O is very popular at Sweetwater for its passive, true-bypass design. BigShot I/O True-bypass Instrument Selector Pedal Features: I/O pedal that switches between 2 instrument inputs Mute footswitch is effective for tuning or between songs Tuner output sends your signal to your favorite tuner Passive, true-bypass circuit retains your core tone Bright, Trim, and Input-2 controls dial in your instrument's tone to taste Control your multi-instrument setup with the BigShot 2-instrument Switching Pedal with Tuner Output Bright Switch Level Control True Bypass.