The Booster Force Multiplier is a module of the Boosting locomotion; it provides a particular functionality for its parent Booster. If it is disabled or removed, then the relevant boosting functionality will behave as by default. Most modules can optionally affect change globally (for both hands' Boosters). Booster modules can also depend upon conditions specified by their dependencies settings.
Use the Force Multiplier to alternate your Booster between different gauges of force. You can set both the default factor and the alternated factor. Force application is handled by the Force Applier.