The unit is very simple in its design, with only two buttons and no moving parts or lids to slow the rescue, the Lifeline AED will ensure a smooth rescue process every time. Clear voice prompts and status lights guide the rescuer through the entire process.? The Lifeline AED is lightweight and mobile, perfect for any environment. Sophisticated technology does not have to mean a higher price. The Defibtech Lifeline AED is very affordable for all users, and will perform when you need it most.