The HEPA filter is a compatible replacement part for the Dreame D9 and L10 Pro robotic vacuum cleaners. The HEPA filter is particularly effective at capturing fine dust, allergens, and other small particles to ensure cleaner and healthier air in your home. It is easy to install and maintain, and it is recommended to replace the filter regularly to maintain optimal vacuum performance. With the HEPA filter for the Dreame D9 and L10 Pro robotic vacuum cleaner, you can ensure that your rooms are thoroughly cleaned and have improved air quality.