Cardiac Science PowerHeart AED G3 Plus Automated External Defibrillator comes with detailed CPR coaching instructions along with voice prompts and text screen displays to guide users through the rescue process. When cardiac arrest occurs, every second counts. The advantage of the PowerHeart AED G3 is that it may be used by anyone who has received basic training on its operation. Electrodes are pre-connected and disposable. Semi-automatic defibrillator with biphasic variable waveform delivers an effective shock in less than 55 seconds. Daily, weekly, and monthly automated self-checks ensure that PowerHeart is always ready to go. Internal memory holds 60 minutes of ECG data. Includes one pair of defibrillation electrodes, instructional CD-ROM and training video, RescueLink and MDLink software and serial communication cable. Seven-year warranty on device & four-year full replacement on battery.