We had this dual-winder and used this dual-winder for a week, before returning it and buying a much better four-watch winder.
The minimum TPD this winder is capable of, is 1440 TPD.
Both winders can be individually turned on and off, but they operate on the same cycle. A single switch is provided to control both winder's winding-cycles. There is really only one almost acceptable winding-cycle, except that it was probably over-winding our very nice watches. Lastly, the instructions are written in extremely broken English, which probably caused the misleading claims that these two internal winders are controlled independently.