Bought and never used due to retirement. The 3M™ Versaflo™ TR-300E+-HIK is a complete Powered Air Respirator System featuring a powered air turbo and filter designed for Particulate respiratory protection and including everything required to get started. This ready-to-use kit provides a simple way to purchase a complete powered air respirator system for use in rugged industrial environments. What's included: M-307 Helmet TR-302E+ Powered Air Turbo TR-326 High Durability Belt TR-341E Battery Charger TR-3712E Filter TR-362 Spark Arrestor TR-3600 Pre-Filter TR-332 High Capacity Battery BT-40 Heavy Duty Breathing Tube TR-971 Airflow Indicator H31P3 Peltor Earmuff kit for helmet 3M Carry Bag / Rucksack