The True-Bypass Brand Double Loop is the next step forward in passive looper design. A true-bypass mechanical switching device designed for both effect and amp switching, it functions as a True-Bypass box, as an effect loop switcher, or as an amp/guitar switcher (without the annoying "pop"), providing the ability to re-route signal path on the fly, effectively reversing the series order of the loops. There is no active circuitry in this device, the battery only powers the LEDs.