Doepfer A-155, Analog-/ Trigger Sequencer, 2 Switch rows with 8 steps each, Eurorack format, Width: 50 HP, Depth: 40 mm, Power requirement: +80 mA (+ 12 V) / -20 mA (-12 V), Optional expander module: Article Nr #192018# (not included, must be ordered as a separate item)