Defibtech Lifeline ECG Monitoring Electrodes are used to monitor heart rhythm for victims of sudden cardiac arrest. These replacement ECG Monitoring Pads can be used with the 3-lead ECG Monitoring Adaptor (DAC-2021), for enhanced ECG monitoring. The pads are self-adhesive and disposable. In manual mode, an ECG appears on the PRO /ECG AED’s color video display. ECG Monitor Mode is intended to be used by personnel trained in basic life and/or advanced life support, or other physician-authorized emergency medical training. Users should be trained in ECG recognition to allow for rhythm and heart rate monitoring using standard ECG monitoring electrodes. Caution: Do not allow defibrillation pads to touch ECG electrodes. Such contact can cause electrical arcing and patient skin burns during defibrillation and may divert defibrillating energy away from the heart.