The fully automatic AED Plus is designed to make using an AED as simple as possible for a lay rescuer. If it detects a shockable heart rhythm, after a brief countdown, the AED Plus will deliver the shock automatically, no need for the rescuer to push the Shock button. The AED Plus® is the only AED with Real CPR Help®, real-time CPR feedback to help rescuers save a life. Only half of all sudden cardiac arrest victims will need a shock, while 100% will need high-quality CPR. Real CPR Help guides you every step of the way, telling you, and showing you, whether you need to "Push Harder" or whether you're providing "Good Compressions." Speed is of the essence when treating a cardiac arrest victim. ZOLL's CPR-D-padz® electrodes feature a unique one-piece design to ensure fast and accurate placement. These electrodes come with a rescue accessory package, which contains scissors and other items that may be required.