TurboDrum enables the most powerful wash and removes the toughest dirt through a strong water stream of rotating drum and pulsator in the opposite direction.To keep inner tub from getting moldy and to reduce drying time by minimizing moisture of laundry To clean inner & outer tub for preventing unpleasant smell of tub If you want 99.9% detergent free clothes even when you put more detergent For washing delicate fabrics such as lingerie and woolens If you want to lock all the keys to prevent settings from being changed by a child