" Operation- " 2.7" LCD, accurate and clear ECG waveform and working state display, economical to save recording paper. " Functions- " Sync collection for 12-lead ECG, adopt digital signal processing technology to get high-quality ECG waveforms via AC filter, baseline filter and EMG filter of ECG signal. " Display of 1/2/3-lead ECG, print mode, sensitivity, paper speed and filter state, etc. on one screen, convenient for contrastively diagnosing.