3 grades adjustable speed with one key: The wind speed is adjustable so as to fit different occasions, like walking, running or riding.
With the nanometer level Filtration technology, combining the Purely stereoscopic air-duct, no worry about your breath.
Skin care, breathable and sealed design: provide the purified air for you.
With the mute ultra-thin customized fan, you can enjoy free breath with the mask.
Ultra lightweight design: create more convenience for you.
Durable service life: it works for 4~8 hours after charging.