3M™ Versaflo Powered Air System TR-300+ combines performance, protection and functionality with modern, stylish, lightweight design and unrivalled comfort. It is the key to easy-to-use, versatile respiratory protection for particulate environments. 3M™ Versaflo™ Powered Air Starter Kit TR-315+ contains TR-302E+ Turbo Unit, Particle Filter, Pre-Filter, Spark Arrestors, Standard Belt, High Capacity Battery, Battery Charger Kit and length adjusting Breathing Tube. Simply add your 3M™ Versaflo™ Headtop for complete respiratory protection.