Ture HEPA Efficiency Filtration: air purifiers utilize a HEPA filter that effectively filters particulate matter as small as 0.3 microns, including smoke, dander, and hair. With a 99.99% filtration rate tested by laboratory. The Air Purifier improves the air quality of your home and promotes the health and well-being of you and your family 360-degree Clean Air: small air purifier features air spiral technology and 360° air Outlet, portable air purifier refreshes the air in rooms up to 538 ft² / 50 m² for 2 times/hour. Compact design allows for placement in any location. It is perfect for office and home. Breathe fresh air and promote your health Personalized Purification Modes: Hepa air purifiers has 1-2 speeds and sleep mode. The higher the speed, the higher the air speed and the faster the purification. When switched to sleep mode, the bedroom air purifier slows down to the lowest possible level and reduces noise to 22 dB.