... seconds after the NF1200 is armed, or* The ON/OFF button is pressed to turn OFF the NF1200, or* The defibrillator pads are removed ... or Fast Ventricular TachycardiaMeets AAMI DF39 guidelinesControls, Indicators, and PromptsPower On/Off Button, i-Button, Shock ButtonState LED, Graphical Rescue Guide LEDProvides voice promptsProvides ...