The Brunswick Mobile Oxygen System effectively supplies oxygen in the field, at accidents, in ambulances or wherever needed. With the use of the Mobile Oxygen System, CPR can be quickly instituted and maintained. Key Facts: Features our innovative, and life-saving, Brunswick Regulator Yoke Module; this device allows for continuous operation without loosing oxygen flow to the patient. Lets you confidently replace an empty cylinder because the second cylinder continues to operate. Comes with a standard 8 foot green oxygen line with quick connectors Has a pre-set regulator with an easy-to-read gauge for monitoring cylinder volume Accommodates two cylinder sizes; either ?D? or ?E?