1.Compatibility: The Vital 100S replacement filter is only compatible with Levoit Smart WiFi Vital 100S Air Purifiers, Vital 100S-RF. NOTE: (Not fit for Levoit Vital 100 Air Purifier, please check your purifier model before making an encoder.) 2.Absorb Household Odors: The Vital 100S replacement filter includes a high-grade activated carbon filter layer that improves its deodorizing ability by 60%. This filter helps to reduce unpleasant odors and fumes such as smoke, cooking odors, and pet odors, as well as VOCs, making it an excellent choice for homes with pets, cooking, and smoking. 3.3-in-1 Filtration: The Vital 100S replacement filter features an upgraded 3-stage filtration system that includes high filtration efficiency material, which can effectively attaching 99.97% of all airborne particles down to 0.3 microns in the air like household dust, pet dander, and smoke particles. 4.: You will receive 2 high cost performance replacement filters for Levoit Vital 100S Air Purifier, The Vital 100S Replacement filter can be easily installed without any tools. Recommended to replace the air purifier every 6-12 months based on the air quality and usage in your area to ensure optimal performance.