Works great. I bought this used from Guitar Center. Thanks for looking.

The SQ-64 is an incredibly powerful and compact Polyphonic Step Sequencer with amazing hands-on intuitive controls and deep editing options to give you all the flexibility and sequencing power needed for all your musical projects. 

With its 64 step pad Matrix, Crystal clear OLED display, sturdy and elegant aluminium body, a wealth of connections and a variety of modes and features, the SQ-64 will become the central piece of your music studio providing total and seamless control over all your instruments so you can focus on what matters most; your music!

• Four-part Note, Mod, and CV/Gate Sequencer
• Drum-Sub Part provides 8 parts of CV and 8 MIDI notes
• 3x Pitch, Gate, and Mod out –The most control outputs for modular and analog synths
• Pitch, Gate, and Mod for each part A –C
• MIDI I/O/O (2 dedicated outs) + Audio Sync I/O
• 64 LED-backlit soft touch buttons
• Project Memory; save and recall all your sequences
• Keyboard mode –play and record in real-time
• Supports all standard voltages, and can be biased as well
• All-aluminum chassis; solid desktop desigv

This unit is USB bus-powered but can also be powered with an optional KA350 power adapter (part# 350012578000) sold separately.