The principle of using an AED is its ability to flawlessly and independently analyze the electrical activity of the heart thanks to electrodes glued to the chest of a non-breathing person. If it is expedient to do so, the device will recommend the execution of the discharge. The defibrillator prepares the parameters for the discharge itself and only prompts the user to execute it by pressing a button. The principle of operation of the AED eliminates the risk of unauthorized discharge and therefore of harm to the persons rescuing or being rescued. These devices can be used safely and effectively by anyone.