... No motor, no noise at work, suitable for family use, a relatively long life (about 10 years).2. ... Adsorbe very small dust and harmful substances such as hair cuttings to the dust collection plate, so that ... . No motor, no noise at work, suitable for family use, a relatively long life (about 10 years). 2. ... very small dust and harmful substances such as hair cuttings to the dust collection plate, so that ...