The Optrel e3000X is the most powerful ventilated breathing protection system available on the market. With the NIOSH-approved e3000X PAPR (powered air-purifying respirator) system you complement your optrel PAPR mask with protection for your respiratory system, making no compromises for safety, comfort and protection. The e3000x has an integrated airflow sensor, 3 level airflow adjustment, 18 hours of battery life, and 240 liters of air per minute available at the touch of a button.