The Saturnworks true bypass A/B 2-loop pedal features one footswitch that between two true bypass loops and a second footswitch allows you to bypass both. True bypass loop pedals allow you to isolate and bypass effects pedals that are not true bypass in order to preserve the guitar's original tone; or, switch on and off groups of pedals at the same time.* This Saturnworks pedal is hand crafted with quality components including heavy duty Neutrik jacks and a rugged die cast aluminum case. This pedal features multi-colored LED's that runs on a 9v adapter with a standard 2.1mm 'Boss' type plug. The adapter is only to power the LED's; the bypass switch itself is totally passive and does not require power to function. The case measures 4.7" x 3.7" x 1.2".