Features: ? 7 inch color LCD touch screen operation system, easy to operate. ? Manual/Auto printing: 3CH,3CH+1R,3CH+3R, ? 6CH,6CH+1R,60 seconds arrhythmia analysis. ? Automatic analysis, calculation, waveform review. ? 1000 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.