Lifepak CR Plus AED Defibrillator by Physio-Control Featuring the same advanced technology trusted by emergency medical professionals yet simple to use the fully-automatic LIFEPAK CR Plus AED is designed specifically for the first person to respond to a victim of sudden cardiac arrest. AED users should be trained in CPR and use of the AED. Latex Free. LIFEPAK AEDs require a prescription in the U.S. Please consult your physician.