The PR500 Series is the redesigned Sperian Opti-Fit ™ Convertible Face-Mounted PAPR, which has been re-engineered and approved for use with the North® RU6500 tight fitting full facepiece Front mount capability provides an alternate option for users who may prefer the comfort of not having the PAPR blower on their belt Allows users the flexibility of converting from APR to PAPR in three different mask sizes Ideal for users who need only High Efficiency Particulate (HEPA) protection Lightweight unit will not slow worker efficiency Water-resistant battery pack is contoured for better fit Complete assembly includes a silicone full facepiece with polycarbonate lens, a blower, a nickel-cadmium battery pack, a power cord, a HEPA filter, a belt and a flow indicator Battery Type NiCd Head Gear Facepiece Respirator