Digital isolation technology minimizes the time and temperature drift of the components Selectable rhythm lead makes it easy to observe arrhythmia ECG waveform Visual alarm for ECG lead-off Automatic measurement and interpretation of ECG waveform assists the doctors with diagnosis Built-in high resolution thermal recorder prints out ECG waveforms, annotations and parameters for diagnosis reference Rechargeable battery supports continuous examination and print-out for 60 minutes or more, with normal operation for 2 hours True one touch operation