The Swamp SW-21 is a solid, all-metal A/B switch pedal built for reliability on stage. Press the A/B function switch to toggle between two amplifier outputs, with LED indicators showing which channel is active. Engage the Y-split function to send your signal to both outputs simultaneously, blending two different amps for expanded sonic possibilities. Constructed entirely from metal for durability that withstands heavy use. Battery powered for LED operation only—switching works without batteries. Perfect for guitarists running dual rigs or needing flexible amp selection.