The AED Plus is the first and only full-rescue AED that provides Real CPR Help® for rate and depth of chest compressions. With real-time feedback the rescuer can provide the best manual CPR possible in a sudden cardiac arrest (SCA). The AED Plus also guides rescuers through the complete Chain of Survival helping all SCA victims, not just those who need a shock. The AED Plus features ZOLL’s unique one-piece electrode pad for fast and accurate placement and is powered by Lithium camera batteries available from retail stores; both having a five (5) year shelf life.