HIGH EFFICIENCY PURIFICATION: Equipped with a True HEPA filter and EcoSilver pre-filter, Hunter air purifiers for home can capture up to 99.97% of airborne particles and reduces allergens and microorganisms for a healthier home environment. COCONUT CARBON PRE-FILTER: The Coconut Carbon Pre-Filter not only captures larger particles but also excels in eliminating harmful VOC's, stubborn household odors, and pet odors, ensuring a comprehensive air purification experience with the HP400 air purifier. EASY TOUCH CONTROL: The Hunter True HEPA Air Purifier features a digital control panel, 3 fan speeds, sleep mode and timer, quiet operation, filter replacement indicator and LED accent light. QUIET OPERATION: Hunter HP400 air purifiers for bedroom feature a sleep mode with quiet operation at only 34 decibels, ensuring restful sleep without typical air purifier sounds. This bedroom air purifier also features a sleep timer with 3 intervals up to 8 hours. Ideal for bedroom, office, living room. PORTABLE AND RELIABLE: This small air purifier is perfect for bedrooms and easy to move from room to room. Additionally, it is backed by a five-year limited warranty from Hunter Fan Company.