2mag MIXcontrol 20 control unit capable of controlling 2 small stirrer units (2x MIXdrive 1 XS units or 2x MIXdrive 1 eco units only. It is NOT possible to 'mix and match'). Requires separate stirrer which is not included. NOT compatible with MIXdrive 5, 15, or 60. With this unit, the use of a distriBOX is not required.