The AED Plus is a user-friendly automated external defibrillator to rescue victims of sudden cardiac arrest and help you provide high-quality CPR. The AED Plus features Real CPR Help, a tool that is able to actually see what you are doing and provide feedback to help you do it well. Audio and visual prompts help you rescue with confidence and clarity. If you are not pushing hard enough, it will tell you to push harder. A metronome leads you to push at the right rate. This defibrillator even shows you the depth of each compression. The device and accessories provide pictures combined with text displays and voice prompts to help rescuers every step of the way. The AED Plus can also defibrillate children up to 8 years age using Zoll Pedi-Padz (sold separately). The automated external defibrillator includes one-piece electrode pad, batteries, and medical prescription. The AED Plus uses inexpensive, consumer lithium batteries that are easy to replace and last five years in standby mode.