Air purifier is an air purification equipment, which is widely used in hospital, small clinic, laboratory, office, meeting room and house etc. It can protect your life and your health through filtering dust, germ and virus in the air. 1.low noise. 2.remote control. 3. Adjustable air velocity. 4.qrj-128:lcd display; kjh-350:led display with touch button. 5. Kjh-350:thorough sterilizing with blue light uv lamp. 6. Kjh-350:eliminate formaldehyde efficiency: 96.2%;eliminate pm2.5 efficiency:99.9%.