Triton PRA001 Powered Respirator Powered respirator very effective in filtering airborne dust Ideal for all woodworking jobs, including sawing, routing, shaping, sanding, and woodturning Ni-Cad batteries provide up to 4 hours of continuous operation Combines lightweight hard hat, full face, hinged visor and eye protection, integral high quality earmuffs, and lightweight adjustable shroud Approved hard hat adjusts to suit common head sizes