Air Purifying Smart Electric Face Mask. Condition is New. Shipped with USPS First Class Package. The mask uses filter elements of N95 grade and high-quality polyester, soft silica gel of food grade ensure no exotics and no damage and comfortable wear. Electric intelligent air purifying technology, produce air with high effectivity and actively deliver fresh air; HEPA 99% strong filtering effect of medical grade. Right inlet and left outlet make sure air in and out orderly, effectively cycling. Protection against gases, smells, PM2.5, pollen, second smoke and pathogens such as viruses and bacteria. Built-in 400mAh safety Li-battery can work for 4-6 hours. Charging time only needs about 30 minutes. Battery life has 3 years at least. Fit face in 3D and keep good sealing; It has large space within the mask for air cycling.It can be used for Running / Travel / Dust / Air Pollution / Motorcycle / Sport. General Type: Electric Air Purifying Masks Color: Black Specification Material: Polyester+soft silica gel of food grade Weight Size Product Weight: 105g Package Weight: 200g Product Size(L x W x H): 18.2 x 15 x 4.2 cm Package Size(L x W x H): 19 x 16 x 5.0 cm Package Contents 1 x Smart Electric Face Mask 1 x User Manual