Doepfer A-154, Sequencer Controller, Expansion module for the A-155 (Article Nr #154958), Various operating modes, LED display, 8 or 16 sequencer steps, Controls up to 2x A-155 (2x A-155 are required for 16 sequencer steps), Eurorack format, Width: 22 HP, Depth: 80 mm, Power consumption: +60 mA (+12V)/ -20 mA (-12V)