This assembly is used on 3M™ Breathe Easy™ Systems. It includes 3M™ Motor Blower 022-00-03R01, Battery Pack BP-15 (Nickel Metal Hydride), Belt 520-02-90R01 and Airflow Indicator 520-01-21. For use with appropriate 3M™ Filter, Filter/Cartridge or Canister and Respirator Headpiece.