This is an easy to use defibrillator with AED and manual modes. In AED mode, it runs in the same way as the Paramedic CU-ER1. In manual mode, the user does the analysis of the victim’s ECG and sets the energy output of the device. The energy output may be set from 2 Joules to 200 Joules. It is intended for use by emergency first responders. Dual Mode Defibrillator The Paramedic CU-ER2 is a portable external defibrillator with the following modes: * Automated External Defibrillation (AED) Mode * Manual Mode In AED Mode, the Paramedic CU-ER2 analyzes the ECG of the patient to determine whether the patient has a shockable or nonshockable ECG rhythm. In this mode, the Paramedic CU-ER2 provides you with voice and text prompts throughout a rescue operation. In Manual Mode, the Paramedic CU-ER2 lets you control the defibrillation process. You assess the ECG of the patient and set the energy of the shock to be delivered. In this mode, the operator has the freedom to set the energy level of the defibrillating shock. The choices are (in Joules) 2,3, 5, 7, 10, 20, 30, 50, 70, 100, 150, 200. You may also perform synchronous cardioversion for the treatment of atrial fibrillation in this mode. In synchronous cardioversion, the defibrillating shock is delivered within 60 milliseconds of the occurrence of a QRS peak in the patient's ECG. ECG monitoring (3 Lead ECG cable) The Paramedic CU-ER2 may also be used to do ECG monitoring only when it is in Manual mode. ECG monitoring only is done by connecting the custom designed ECG monitoring cable assembly from CU Medical Systems, Inc. No shocks may be delivered when the ECG monitoring cable assembly is connected to the Paramedic CU-ER2.