Attributes . 100% Cotton FR Treated Face Seal, 110-240V, 50/60 Hz Smart Charger, 8-Speed Fan, Air Train, APF Level of 25, Audible, Visual and Vibration Alarms for Low Battery, Flow and Missing Filter, Double Pull Straps for Even Distribution When Tightening, Filter Holder, Filters 99.97% of Particulates Larger Than 0.3 Micrometers, Flip-Up Visor, LED Indicators Let User Know When Unit is Charging, Complete or An Error Has Occurred, Removable Hose Cover, Same Quick-Disconnect Bayonet Coupler, User Control of Airflow Direction . Names