The AED Plus features simple-to-interpret graphical images that alert the potential rescuer that the lid can be propped under the victim's head to help keep his/her airway open while emergency procedures are underway. The sizeable graphic images on the AED?s cover help to simplify the instructions and help untrained responders understand the step-by-step rescue process. The Zoll AED Plus, Real CPR Help provides a metronome that uses real-time compression data to instantly adjust and help keep the rescuer administering chest compressions at the optimal rate. Another unique feature of the device is its one-piece electrode, which allows the pad to be placed quickly, directly in the center of the SCA victim's chest. The easier the process, the more confidence a potential rescuer will have during a chaotic life or death event. When it comes to cardiac arrest, confidence can make the difference in a life being saved. he Zoll AED Plus uses long-lasting lithium batteries; in fact, it's the only AED available on the market that utilizes them. Not only are these both affordable and accessible, they will last up to five years when the device is left in standby mode. AED maintenance is made even easier because the CPR-D adult electrode also lasts five years. No confusion, no hassle.