The Airshield is a battery powered respirator that provides excellent protection from the inhalation of harmful dust while at the same time protecting your eyes and face from flying debris. Standard run time is 4 hours with the included battery, but because the Airshield has 2 battery compartments, a second battery can be installed that will permit up to 8 hours of continuous use. The Airshield comes complete with battery charger, THP/2 fine filter pre-filter airflow indicator, visor overlay and plastic carry bag. Specifications: airflow minimum 4.94 cf/m and maximum 6.36 cf/m. Weight is only 26 oz. Eye protection to BS EN 166:1995. Low energy impact and respiratory protection to BS EN 146 THP2.