filters can greatly improve air quality, reducing particle size by up to 99.97%. Helps remove household dust, pet dander, etc. [Scope of application]The spa stick is suitable for most spas and , perfect for walk-in tubs, , alcove tubs, swimming pools, , warm-up boats and the easiest to use standard tubs Clean accessories keep your home robot performing at its best. Say goodbye to odors, pre-filters can help reduce unpleasant odors from pets, smoke, cooking fumes and a variety of household products and chemicals. Cleaning accessories keep your robot clean while reducing the infiltration of dust, pollen and other into the air you breathe.