LEVOIT Air Purifiers for Home Bedroom, HEPA Fresheners Filter Small Room Cleaner with FragranceFeatures LEVOIT LV H128 TRUE AIR PURIFIERS can effectively capture and filter at least 99. 97% of airborne particles 0. 3 microns in size. solve indoor air problems, MAKE YOUR AIR FRESHER The LV 128 has SLEEP MODE that can avoid this problem! Sound is lowered to 28 dB in SLEEP MODE AND LIGHTS OUT AUTOMATICALLY, whether you're working, talking, or sleeping. LV H128 helps you! Add 2 3 DROPS OF YOUR FAVORITE ESSENTIAL OILS (not included) to the AROMA pad