exp pedal 5 (ctrl 7/8), exp pedal 4 (ctrl 5/6), amp control 2, amp control 1, rock solid metal construction for stage use, 2x amp control switches for controlling amp channels or effects. Connections: AC adapter (DC in), exp pedal 3 (ctrl 3/4), MIDI in, RRC2 out, MIDI out, mode. Includes 6x AA batteries. optional power supply (BOSS PSA AC adapter). dimensions: 55 x 24 x 8cm