As an emergency AED external defibrillator monitor, F5 provides reliable and excellent defibrillation support for adult and pediatric cardiac arrest patients during the emergency process.Different from most AEDs on the market, F5 provides two working modes: AED and manual defibrillation, which can be used in multiple scenarios such as in-hospital and out-of-hospital use,and quickly support and respond to emergency rescue efforts. About 540,000 people die of sudden cardiac death every year in China, On average, one person dies from a heart attack every minute ，90% of which occured outside the hospital, and the success rate of treatment in China was less than 1%. The medical "golden 4 minutes" means that within the first 4 minutes of the onset, cardiopulmonary resuscitation plus cardiac defibrillation is the only treatment method. The faster the defibrillation is performed, the higher the success rate of the rescue. F5 performs well in emergency speed: it only takes 10 seconds to complete from power-on - heart rhythm analysis - discharge - defibrillation; the defibrillation energy has been further improved, supporting a maximum energy selection of 360J and the widest range of impedance values (20- 300Ω), suitable for a wider range of patient types, and can improve the defibrillation success rate of patients with high defibrillation thresholds such as myocardial infarction, obesity, and high impedance. F5 has both practical auxiliary functions: 3-lead ECG monitoring, automatic impedance compensation, and CPR assistance, which can help emergency personnel to quickly complete diagnosis and rescue, and achieve full protection in the pre-hospital and hospital.