4WDKING Rechargeable Electric Air Purifying, Reusable Portable Air Purifier

Supplied fresh air respirator system is equipped with portable power sources mainly overcome the problems of big air intaking resistance, difficulties in breathing, and so on. | Unique electronic ventilation design system, to keep the fresh air flowing through your nose and mouth, suitable for long time use. | With filter function, 99.9% filter effect with Japan H13 high quality material filters. | You can connect the electric air filter to anywhere you wantand then optionally tie to arms, neck, waist, and head. | Continuous 500hours working by each filter element, adjustable wind speed, can be used for 8-10 hours with full charge, larger battery capacity, longer working time.