The DL300 is a 3 gear sequencer. The units are sold in a DL100, DL200 and DL300 version. This is a product we manufacture and distribute.
The DL300 ( generic ) is also sold in a DL100 and DL200. Each version is set-up to work out the box with 30, 60 and 90 size plane gear units. The units is not user configurable.