Lifeline AED The AED that started it all The original Defibtech AED includes all mission critical features necessary to provide the most advanced treatment for Sudden Cardiac Arrest. It is so simple and unintimidating to use that even non-medical personnel can effectively save lives. Simple to Use Simple, clear and straightforward: there are only two-buttons on the unit, a green button to turn the unit on and a red one to shock the patient, if needed. The Lifeline AED: simple and intuitive. Clear Voice Prompts Saving lives, while rewarding, can be stressful. A calm voice leads the user through the rescue, clearly and concisely stating each instruction, one step at a time. Brightly lit progress lights provide clear visual text guidance to reinforce voice instructions. Long Life Battery Two long life batteries are available: a 5 year battery that will deliver 125 shocks or work continuously for 8 hours or a 7 year battery.