Use this all-in-one filter system for your Z-1000 small air purifier to capture ultra-fine dust particles down to 0.2 microns. The first filter moment is done thanks to the washable pre-filter, which combats pet hair and dust. The carbon filter captures the odours and gases from the air. Thanks to the 360-degree filtration, the air in your room is filtered in all directions. This combination filter has been developed to filter microscopic particles such as viruses, allergens, dust, pet dander, bacteria, volatile organic compounds and odourous gases from the air. The indicator light on the air cleaner lights up when you need to replace the filters.