Alleviate your allergies while you're at home with the Philips AC3256/60 air purifier. It's built using VitaShield IPS technology, which can naturally remove ultra-fine 0.02 µm particles and 99.9% of common airborne allergens effectively over the long term, to leave the air pure enough for even the most sensitive of people. Key Features: Professional-grade Aerasense sensing technology provides real-time indoor air quality Extra-thick NanoProtect HEPA and AC filter is designed for superior purification efficiency and lifetime against airborne particles Allergen Mode is very effective at removing common airborne allergens and will boost its cleaning performance when it detects the slightest change in air quality Numerical PM2.5 indicator together with 4-Step colour ring feedback delivers real-time indoor air quality Healthy air protection alert lets you know promptly when it's time to replace the filter Stops working when filter is not replaced at necessary time to ensure it doesn't run without any effect Ultra-silent in sleep mode at only 33 dB - Product turns down fan speed and noise level in silent mode for a comfortable night of sleep; lights on products can be turned off as desired Sensor touch UI with big numerical display Large handle for easy carrying around