The Boss Katana-50 MkII EX expands on the capabilities of the popular Katana-50 MkII model, providing more performance versatility in the same portable design. GA-FC and GA-FC EX support allows you to select Tone Setting memories, turn effects on/off, and more with these dedicated foot controllers. There's also a line output for sending mix-ready tone to a house PA, plus the ability to link a second Katana MkII amp with the Stereo Expand feature.