Super easy, mute your iPhone signal for tuning (or whenever you need to take a break) all you have to do is get this little box and you'll be all set. Your signal will be completely muted. This box uses a latching switch, so to unmute, you'll have to press the switch again.
Includes LED to show that the signal has been muted. The LED requires a 9V power-supply (no included) to light up, but the pedal will work with out it.
*This version has the 1/8" jacks.