The device's dimensions are such that it is interchangeable with the manufacturer-provided sample holder. Each vial holder dimension and position exactly match the standard. A motor is used for rotating an internal plate with magnets, such that the magnetic stirring bars inside the sample vials will rotate and thus stirring is achieved. The control module is separated from the stirring module (Fig. ). The stirring speed range is 200-1200 rpm (in jumps of 100) and is controlled by an onboard microcontroller and an organic light emitting diode screen provides the actual readout of the battery status and rotation rate.