pollution

Features : - Premium polyester PU sponge with silicone inserts, soft and lightweight, ergonomic 3D design perfectly fits most people's noses, safe and comfortable to wear. - Activated carbon filter, can absorb odor and formaldehyde and other substances. - 4-layered filtration, effectively filter out the harmful micro particles. - HEPA filter cotton, reach 99% strong filtering efficiency of medical grade. - Built-in explosion-proof li-ion battery, no leakage, safe to use. USB charging way provides convenient use. - Smart breathing valve with exhalation outlet for your smooth breathing. Built-in micro fan draws fresh air in, preventing your glasses fogging up. - Effectively prevent dust, germs, PM2.5, PM0.3, allergies, smoke, pollution, ash, pollen. - Perfect for riding, hiking, outing, handcraft projects, gardening working or just for daily wearing. Specification : - Color: Black - Max noise: 27DB - Input voltage: 5V - Charging time: 2H - Interface: Mini USB - Battery capacity: 600mAh - Battery type: Li-ion battery - Material: Polyester PU sponge, silicone, filter cotton - Charging cable: Mini USB charging cable (Included) - Working time: High speed: 4H, medium speed: 6H, low speed: 8H - Filtering efficiency: 99.98% (Particulate matters larger than 0.3 microns) - Fan air volume: 3 level adjustable(High speed: 4.5CMF; Medium speed: 3.2CMF; Low speed: 2.2CMF) Package includeds : 1 x Dust mask 1 x Silicone liner 5 x Filter elements 1 x Micro fan module 1 x User manual 1 x Mini USB charging cable Details pictures :