The Lifeline ECG AED offers professional responders a mode that displays the ECG waveform in addition to an AED mode that gives step-by step instructions using a full-color interactive video display with voice prompts and text. The professional user is shown everything they need to know about the patient: ECG waveform, heart rate, number of shocks delivered, and elapsed rescue time. Real Time Protocol Selection enables you to switch rescue protocols at any time. Easy to maintain, a status screen gives you up to the minute information regarding the device and its components. The highly visible yellow device is lightweight, durable, and field upgradable.