3. Plus/Minus Quantity: it is to auto add or reduce the capsule quantity per second when pressing button …or… under the condition “auto control” or “manual” way. The unit is: pcs/min. For example: the number is 50, which means that the system will add or reduce 50pcs of the “Capacity per minute” in every second automatically when pressing the plus or minus button, it runs according to the changed speed after loosening the button.