The application of fluid analysis techniques has resulted in a high efficiency design that generates the high power that's the source of the powerful suction. Blows away sand and light dust particles with a powerful airflow to clean places such as entrances and hallways. The unit can hold a 5 liters of dust in a washable dust cloth filter. This enables you to vacuum the house from corner to corner while reducing the frequency of dust disposal. The indicator turns on when the dust container is full to prevent overflowing. The brush lets you clean even surfaces such as bookshelves and fragile areas!