DESCRIPTION: Control a Boss pedal with another Boss pedal. I've wired a 3mm mono jack in the rear of two boss pedals. Piggybacked of the internal switch and ran to a input jack in the back. Remotely control two pedals at once without having to step on two pedals at one time. Super convenient! Perfect for when you turn on a distortion pedal and want the noise gate to kick in at the same time.