- Powered air system combines performance, protection and functionality with modern, stylish, lightweight design and unrivalled comfort. Includes TR302E+ Turbo Unit, Particle Filter, PreFilter, Spark Arrestors, Standard Belt, High Capacity Battery, Battery Charger Kit and length adjusting Breathing Tube, selectable flow rate options185l/mn and 205l/mn. Simply add the headtop required. Slim, lightweight balanced design with Intelligent lithium ion battery quickly charges, has no memory effect and incorporates useful charge indicator. Electronic audible and visual low air flow and low battery alarms as well as battery charge indicator /particulate filter loading status indicators and airflow indicator.