Boss GA-FC EX Foot Controller for Katana AmpsThe GA FC EX provides expanded foot control functionality for select BOSS amplifier models. It maintains the simple setup and intuitive workflow of the standard GA FC while offering additional functions for greater performance flexibility. Standard Features Expanded GA FC with enhanced functionality for select BOSS amplifiers Rugged metal chassis and six heavy duty footswitches Control channel selection, effect on off, and more Two color LEDs for easy