Features:• Digital isolation technology minimized signal interference;• Wide screen LCD with 3 leads waveforms display; • Optional rhythm lead detection for observing abnormal heart rate;• Build-in rechargeable battery, AC / DC supply;• Power off automatically after long time non-operation;• The width of baseline is adjustable, convenient to observe;• High resolution and precision thermal array printer;• Internal memory supporting ECG data and waveforms store and recall.