Compact air purifier with intelligent Smart sensors, which help deliver Real Time air quality by removing 99.5% of ultrafine particles such as dust, pollen, allergens, bacteria and viruses. Powerful high performance 3D airflow technology which removes particles as small as 0.003 microns. Features: 2-layer filtration with NanoProtect HEPA filter and pre-filter Compact size and low energy consumption - mains operated, with Auto mode and 2 x manual speed levels Smart filter indicator which notifies you when the filter needs replacing, and real-time air quality display Scans the air 1000x a second to detect ultrafine particles Has a 24/7 continuous operation capability, with Sleep Mode with ultra-quiet near silent operation and dimmed lights Purifies 20m² in less than 16 minutes, in rooms up to 49m² Runs at max. 20 Watts power Each Philips air purifier is subjected to rigorous life and durability tests before being released from the factory Specifications: Dimensions: H:27.6 x W:27.6 x D:4