If you want to keep your hands on your ax at all times, the Roland GA Foot Controller lets you drive the GA212 or GA112 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.