Monster Effects Swamp Thang pedals are made one at a time using the finest materials and parts available. The Swamp Thang is designed to replicate the Fender brown face tremolo in a small convenient package. This tremolo pedal features an all analog design, full sized pots, a Switchcraft power jack, over-voltage protection, true bypass and the ability to be used with either a 9v. pos. center pin or 9v. neg. center pin power adapter or battery. Each Swamp Thang is meticulously hand wired with silver solder and tested using ears, not machines.