In the words of Boss:

The genuine BOSS and Roland Dimension effect is back, and more versatile than ever! Designed in the premium Waza Craft analog tradition, the DC-2W offers not only a perfect sonic recreation of the original DC-2 Dimension C pedal, but also the legendary SDD-320 Dimension D studio rack effect it was based on. The DC-2W features the same intuitive four-button preset interface as the original 80s-era effects, now evolved with electronic switching that unlocks a multitude of sonic variations not available on the vintage units.