The Four True Bypass Looper helps you externally control up to four stomp boxes. The loops can be used one at a time or in any combination . Each loop is properly grounded which provides for quiet switching and zero bleed over. Power is only required to operate the bright LED lights and connects through a standard 9V boss style connector. This looper is encased in a durable raw aluminum enclosure (12" x 2" x 1.65") . The graphics are silk-screened onto the enclosure.