The new ZGW-0b adds several new features to the classic ZGW-0 including:

1.  A three-motor recliner that allows motorized angle adjustment of the backrest as well as the seat and legrest.  This allows for a full range of position options from fully upright to zero gravity to fully flat – even to sub-supine!

2.  A motorized height mast that lifts and lowers the monitor arm and keyboard tray arm.  This makes it much better able to support a standing work position and allows for easy position adjustments as well as making it easy to get in and out of the chair.