4-STAGE AIR PURIFICATION: Cleans the air in four stages making it the ideal air purifier for allergies and pets. Stage 1: Activated carbon pre-filter; Stage 2: True HEPA filter; Stage 3: UV-C light; Stage 4: Ionizer SMART AIR QUALITY MONITOR: Detects air particles and displays air quality using a color-coded lighting system, then automatically adjusts fan speed in real-time to achieve clean air in medium to large rooms up to 190 square feet and larger 3-SPEED FAN: Offers adjustable low, medium, and high settings to let you choose based on the needs of the room FILTER RESET INDICATOR: Lets you know when it's time to change the activated carbon pre-filter and HEPA air filter WHAT YOU GET: 4-in-1 air purifier, activated carbon pre-filter, HEPA air filter, UV-C light bulb, industry-leading 5 Year Warranty, customer support 7 days a week, and the peace of mind that comes from a trusted brand with millions of customers worldwide