All-in-one air purifier delivers multiple functioning air cleaning technologies in one compact device Unit combines proven technologies of pre-filter, HEPA, carbon filter, and UV light Excellent capacity of clean air delivery rate (CADR), capture most of the smoke, pollen, and dust with 99.97% purification rate Active carbon filter captures and neutralizes common chemicals, gases, odors and tobacco smoke with the highly absorbent micro-pores Independent negative ion generator with UL certification With more than 3,000,000 ions/cc released User-friendly handle on the top, makes it safe and easy for use Compared with other products with same size, it has higher efficiency as its direct and logical airflow route way Whisper operation is for good sleeping and 25% quieter than most same size units Low, medium, high, and three speeds for choice With 2, 4, and 8 hours timer control