The ZOLL AED 3 is the latest automated external defibrillator manufacturer of ZOLL. The Zoll AED 3 focuses, like its predecessor, also on usability and support towards the rescuer. So that both a trained counselor, as a layman, can directly with the device to work. The newest AED ZOLL also features Real CPR Help technology. This known ZOLL technology ensures that immediate feedback is provided to guide rescuers in this way during a rescue. The electrodes of the ZOLL AED 3 is a sensor, allowing the AED can monitor exactly whether the chest compressions given, meet the guidelines. Then, the AED rescuer through instructions and a level bar on the screen, guidance to the proper depth (5-6 cm for adults) and frequency to apply (at least 100 per minute) of chest compressions. The Zoll AED 3 can be used both vertically and horizontally, so that the rescuer has the best view of the screen.