Details [High Efficiency Air Purifiers] Breathe in the fresh air with large room air purifiers that cover an area up to 1730 sq.ft in just 1 hour. Home air purifiers refresh the air 5x per hour, and feature a powerful 3-stage filtration system consisting of a pre-filter, HEPA filter, and activated carbon filter. [Fragrance Sponge & Washable filter cover] The top of the air purifier is equipped with an essential oil cotton pad, you can drop your favorite essential oil, which can help you sleep or refresh yourself. The washable filter cover can be washed directly with water. [3-Fan Speed & 5 Timers] Air purifier offers three gears of air flow intensity for you to choose from - low, medium, and high. Not sure which fan speed to choose? Air Purifier Auto Mode can automatically adjust fan speed based on real-time air quality. 5 timer options (2/4/6/8/12H) are convenient for your life. [Air Quality Display] Smart air purifiers feature a built-in air quality sensor that displays real-time PM2.5 levels on the air purifiers display screen. Enjoy peaceful and undisturbed moments with our ultra quiet air purifier. The lowest working noise is ≤15dB, it ensures a serene environment for your home [Filter Reminder] Air purifier has a filter replacement reminder function. When the filter reaches its service life, the FILTER will light up red and flash to remind you that needs to be replaced. Just press and hold the "TIMER" button for 3-5 seconds, and the red flashing will disappear.