Supplied fresh air respirator system is equipped with portable power sources mainly overcome the problems of big air intake 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 want and then optionally tie to arms, neck, waist, and head. PERSONAL AIR FILTER HEPA New In Box. Condition is "New". Shipped with USPS Priority Mail. ?Easy to wear? The mini purifier can be trouser pocket, etc. Unique electronic ventilation design system, to keep the fresh air flowing through your nose and mouth, suitable for long time use. ?Battery life? adjustable wind speed, can be used for 8-10 hours with full charge, larger battery capacity, longer working time. ?Filter replacement time?Continuous 500hours working by each filter element ?Air supply system?Equipped with a mini air purifier to provide air supply, making your breathing more comfortable. Brand new! - Eliminate bacterial viruses and prevent diseases. - Imported Japan H13 HEPA. PM2.5 Filter effect reaches 99.95%. - Unique Ventilation design system to keep fresh air flowing. - Longer lifespan, safer use, cost-effective. - Rechargeable Battery. Item includes: - 4 KN95 Masks - 3 HEPA Filters - Air purifier device - Manual - USB Charger - Sticker - Hose and tubes.