Features: ? 9 inch color LCD touch screen operation system, easy to operate. ? Manual/Auto printing: 3CH+3R,6CH,6CH+1R, ? 12CH,12CH+1R. ? 5 minutes arrhythmia analysis. ? Automatic analysis, calculation, waveform review. ? 2000 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.