This product is SOLD AS IS With more than a 50% reduction in sound, the Vacu-Aide QSU is the quietest high flow/high suction portable unit on the market, making it a smart choice for patients from neonate to adult Vacuum adjustment allows for 50-550 mm Hg and a free flow of 27 liters/minute (Figure A) Optional sealed lead acid battery for use up to one-hour operation Meets American Association for Respiratory Care (AARC) guidelines for neonatal, infant, child and adult homecare suctioning Can return a patient to a state of comfort quickly – Meets ISO 10079-1:2009 high vacuum, high flow classification Unit can be operated while inside the carrying case (Figure B-C) Float shutoff on the container to protect against overflow and integrated bacteria filter to prevent back flow Don't hesitate to get in touch with us for more information.