Rapid response systems use the Zoll M-series defibrillator, which has a 3-step semi-automatic defibrillation process. The first step is to turn on the device. In the second step, the device will analyze the patient's heart rhythm. If a shock is advised based on a shockable rhythm, the device will automatically charge to the preset energy level. The third step is to press the shock button to deliver the shock to the patient within 15 seconds of the device being fully charged. The summary continues CPR for 2 minutes before restarting analysis in line with resuscitation protocols.