- Arturia Keystep 37 Black Edition; 37-key (slimkey) USB controller keyboard; velocity-sensitive mini-keys with aftertouch; 64-step sequencer; chord and scale functionality; arpeggiator; LED display; 4 freely assignable knobs; transport keys; touch stripes for pitch and modulation; RGB LED bar; connections: 3x CV output (3.5mm jack), clock sync input and output (3.5mm jack), sustain pedal input (6.3mm jack), USB, MIDI In/Out, input for external power supply (optional, not included); including Download software package: Arturia Analog Lab Intro and Ableton Live Lite; including 3 CV/Gate cable, USB cable and Anti Ground Loop adapter; dimensions (W x H x D): 550 x 35 x 147mm; weight: 1,6kg