The Philips Series 800 Air Purifier is a powerful and intelligent device that ensures clean and healthy air in your home. With its intelligent auto purification mode, it can sense and react to even the slightest change in the air, thanks to its professional-grade sensor. The real-time air quality is indicated by a 4-step color system, ranging from blue for good air quality to red for poor air quality, giving you peace of mind about the air you breathe. In sleep mode, the purifier operates quietly with dimmed lights, making it perfect for use in bedrooms or baby rooms, with noise levels as low as 35db(A). The purifier is highly effective in removing nano-sized particles as small as 0.003um, including PM2.5, pollen, dust, and pet dander. It also eliminates 99.9% of bacteria and viruses, ensuring a healthier environment. Additionally, it effectively removes harmful gases like TVOC and odors, providing you with clean and fresh air at all times. With the Philips Series 800 Air Purifier, you can breathe easy knowing that you and your family are protected from air pollutants.