Sensor of air cleaning monitor that will change the speed automatically according to the air quality. Mutiple filtration:pre-filter,activated carbon and HEPA. Nanometer photocatalyst is continally decompose the deleterious gas. UV lamp for sterilizing and disinfecting. The pre-filter is used for collect and absorb the large size paritcle in the air . The activated carbon is used for absorb the bad odor and unpleastant smell in the air. The HEPA filter effectively filtrate paritcle as tiny as 0.3 um such as pollen,smoke,air borne dust and allergens with an efficent up to 99.97 %. Negetive ion generator refresh indoors air. It can hanged on the wall and easy to use.Parameters Unit Data Remark Power W 170 Noise dB(max) 50 Airflow h/m3 700 Anion cententration 2*1000000 Net weight kg 18.5 Suitable area m3 100-180 Package size mm*mm*mm 1270*390*580