Boss GA-FC-EX Expanded floor controller for selected Boss amplifiersIntroducing the Boss GA FC EX Expanded floor controller for selected Boss amplifiers The BOSS GA FC EX Foot Controller gives guitarists expanded hands free control of select BOSS amplifiers, keeping your hands on the guitar while unlocking extra performance flexibility. Building on the standard GA FC, it adds enhanced features including two colour status LEDs for clear visual feedback, an additional control jack with a three way mode selector, and