Note：Only for H7120（ASIN:B0CJBH4QXK). Desktop Purification Area: Designed with a larger air inlet, Suitable for bedrooms, living rooms and kitchens to purify rooms using a 360°air intake. Maintenance Tip: Depending on how often you use the air purifier, you may need to replace the filter earlier or later. Using an air purifier in an environment with relatively poor air quality may require you to change the filter more frequently. Replace With New Filter: When the filter's life ends, the filter exchange indicator light will turn red. After replacing with the new filter, press and hold the button for 3 seconds. The indicator will flash 3 times and will be successfully reset. Suitable Choice: It is highly recommended to use the official replacement filter to keep your H7120 air purifier in good working efficiency and capacity, allowing you to breathe fresher and cleaner air all the time. Air Purifier Replacement Filter only for H7120, 3 Layers of Defense, HEPA, High-Efficiency Activated Carbon, Pre-Filter