1. Multi-speed control; 2. Indoor temperature and humidity display; 3. Manual/automatic mode switching; 4. PM2.5 digital display; 5. PM10 digital display; 6. VOC display; 7. Filter replacement reminder; 8. Bypass/inner loop/electrostatic interface; 9. WIFI (APP); 10. Clock display; 11. Sensitization monitoring, 12. Automatic brightness reduction at night;