Philips Air Purifier AC1215 has Vitashield IPS with its aerodynamic design and NanoProtect Pro Filter. It also has a boosted clean air delivery rate up to 270 m3/hr. It can effectively remove ultra-fine particles as small as 0.02um. Also it filters out harmful gases such as formaldehyde and TVOC. Air Purifier comes with NightSense Mode which is developed especially for your bedroom; The air purifier rapidly prepares your bedroom air for sleep and constantly monitors your bedroom air quality, delivering clean air while you sleep. The dimmed and/or switched off lights and the low sound help you and your family sleep better.