Characteristic: 1. Shell: high-strength ABS casing; 2. Negative ions: 6X106pcs/cm3; 3. Filtration system: three-layer filtration (Pre-cotton, activated carbon, photocatalyst); 4. In and out of the wind: top air inlet, side air outlet; 5. Medical grade UV germicidal lamp; 6. Reserve aromatherapy tank at the bottom; 7. Start automatically with the car, two speeds; 8. Equipped with anti-slip strips or metal hangers + straps.