The Line 6 FBV2 is a compact and robust footswitch designed specifically for guitar amplifiers, providing musicians with a convenient way to control their effects and sounds. This foot pedal features two dedicated buttons that allow users to switch between presets, enabling quick changes during performances. While it is touted for its high build quality, it's worth noting that this particular listing is untested, which implies it may require some repairs or is intended for parts only. The pedal is compatible with various Line 6 amplifiers and is known for its reliability amongst musicians who rely heavily on footswitch controls. Versatile and user-friendly, the FBV2 is an essential tool for guitarists looking to enhance their playing experience without needing to step away from their instrument.