Hopper Pedals incorporated the "X" style wiring scheme when designing this pedal which allows for quiet switching. Blue and Red led's provide for easy signal route identification. The A/B box incorporates a Hammond 1590A (3.64" x 1.52" x 1.06")enclosure, Switchcraft jacks, chrome bezels with a glass lenses, heavy duty 3PDT switch, and a standard 2.1 x 5.5mm Boss style 9V DC jack. The Mini-A/B Box can also be used without power