Plasmacluster Ion: SHARP's patented technology uses nature's way of purification and is certified by laboratories the world over including the coveted IIT Delhi, British Allergy Foundation SHARP Room Air Purifiers work on the concept of Dual Purification by use of the Plasmacluster & Filters (Pre-Filter, HEPA, Carbon) and is the perfect choice for an air purifier for homes and offices HEPA Filter traps 99.97% allergens and microscopic dust as smallest as 0.3-micron and has a standard life of up to 2 years Active Carbon Filter deodourizes the air and removes Volatile Organic Compound (VOCs), absorbs cigarette odour, pet odour and many other common household odours and has a standard life of up to 2 years Lifelong functioning advanced Pre-Filter to capture P10 particles Filters: Pre-Filter (Fine-Mesh Type), HEPA Filter & Active-Carbon Filter Modes: Haze Mode, Sleep Mode Sensors: Odour Sensor, Dust Sensor, Light Sensor Filter Life up to 2 Years (may vary according to use and environment conditions, depending on fan speed & indoor environment conditions)