The Triple True Bypass Looper can externally control three non-true bypass stomp boxes. This looper is properly grounded which provides for quiet switching and zero bleed over. Loops can be activated in any combination or all at once. Power is only required to operate the bright LED lights and connects through a standard 9V boss style connector. Please enter LED selection e.g. Loop 1 : Blue, Loop 2: Green, Loop 3: Violet