Features: ? 4.3 inch color LCD screen operation system, 12 leads simultaneously display. ? Manual/Auto printing: 3CH,3CH+1R,60 seconds arrhythmia analysis. ? Automatic analysis, calculation, waveform review. ? 200 ECG data storage, SD card supported. ? Alarm of electrodes breaking off, human diagram indicates the unconnected lead. ? V1,V3,V5 chest lead examination mode, fit for massive physical examination.