Five Layers Air Purifier with High Efficiency and Unobstructed Structure Features: The absolutely exceptional design for air purifier is regarded as an art which purifies the air quietly and efficiently With fine looking and compact but unobstructed structure, all the most advanced air purification technologies are applied The tailor-made centrifugal fan brings quiet breeze of purified air Two air outlets provide more airflow in a balanced way to the whole space ADA's traditional automatic shutdown function provides a safe operation even by children The powerful five-stage filtration technology and the additional fragrance dispenser create a purified and pleasant home environment Stage 1: HEPA filter to retain dust, pollen, and particles Stage 2: activated carbon filter to absorb smells Stage 3: plasma filter to reduce mold spores, viruses, and bacteria Stage 4: TiO2 filter and UV light to decompose and kill viruses and bacteria Stage 5: negative ions to fresh the air by bonding molecules which are positively-charged Stage 6: fragrance dispenser to spread your favorite fragrance into the air Color: optional