If you want to keep your hands on your ax at all times, the GA-FC foot controller lets you drive the GA-212 or GA-112 from the floor. It also allows expansion. Plug in up to two optional Expression pedals* for volume and drive control, and link to additional stacked amps with the Link In/Out port. Switch instantly between four channels and two routes of loops, reverbs, boost settings, etc. Simultaneously connect two expression pedals* for realtime control of volume and drive Simultaneously control stacked amps via Link In/Out port * EV-5, FV-500L, and FV-500H are available as optional expression pedals for the GA-FC.