Versaflo™ TR-300 PAPR Complete Assembly Kit, Lithium-Ion BatteryTwo selectable flow rate options 6. 5 CFM and 7. 2 CFM offers more options and comfort to the user Easy to use and versatile PAPR system for particulate environments The high efficiency battery allows you to work in a remote location for extended periods of time Two types of alarms one audible and one visual alert user to either a low battery or low flow, such as when a particle filter is fully loaded LED lights on the battery indicate its charge