Brand new in box Airboss wearable face mask with Active Air Supply – the built-in fan provides a cooling pleasant airflow instead of making you breathe through a passive filter. Rechargeable – it has an internal battery that you recharge via USB. Quad-layer filter technology – the replaceable filter cartridges contain multiple layers to remove dust and other airborne particles, there are 5 spare filters with this unit. There are 2 fan speeds and an optional led which can light up blue as seen in photo. What it's good for These devices can be useful for: Dusty environments Pollen/allergy season Smoke or poor air quality Commuting in urban pollution
