1. Multilayer filtration system (washable pre-filter + HEPA filter + activated carbon filter + negative ion)

2. Particle sensor,optional PM2.5 digital display,automatic control of wind speed

3. Three air light bars display

4. PM2.5 Air Quality and Numeric Display

5. Interactive voice communication system

6. Four timer setting power off

7. 4 wind speed adjustment, rapid smoke clearance, sleep function

8. HEPA Replacement Timing Function

9. APP control as optional