The SR 500 and SR 700 are high-performance, battery-powered fan units designed to deliver safe, reliable and efficient respiratory protection. Built for use with particle filters, both models ensure consistent airflow and user comfort in demanding environments. The SR 500 offers added versatility with support for combination filters and comes with a PVC belt, while the SR 700 is a more lightweight, particle-only option ideal for streamlined protection. Features and Benefits SR 500 supports particle and combination filters for broader protection SR 700 designed specifically for particle filter use Both units feature a Heavy Duty 3.5 Ah battery for extended use Easy to operate for quick, reliable deployment Ideal for tough, long-duration tasks requiring powered respiratory support Standards EN 12941 EN 12942