When a Mass Casualty Incident occurs, many patients need immediate and simultaneous access to life-saving oxygen at the site of the emergency. With the O2 Box Rescue compact we have produced a portable oxygen system to withstand the toughest conditions. The MCI-tested box has a 2000-liter oxygen supply for simultaneous care of up to four patients. Emergency personnel can connect an external ventilator or a resuscitator to the Box at any time in order to prepare patients for immediate transport and to maintain their vital functions. The Box's compact dimensions make it much handier than the previous model. To make sure that the O2 Box Rescue compact can stand up to rugged conditions, we have installed special foam padding to protect the oxygen cylinders and pressure reducers.