The Oxylator EM-100 is not a demand valve or vent, but a pressure limited/ flow triggered ventilation device designed to replace the BVM during CPR and short transport. It is very small, lightweight, rugged and easy to use/clean. The Oxylator EM-100 is ideal for confined space or toxic environment extrication/rescue and offers a hands-free ventilation feature that operates in-sync with chest compressions. From Lifesaving Systems, the EM-100 alerts to airway obstruction with a stuttering sound and delivers consistent AHA required volumes.