Automatic measurement of ECG waveform Fully automatic waveform analysis report output Complete digital design, single color LCD display Simultaneously 12 leads acquisition, optional    selections for  rhythm lead Automatic adjustment of baseline, amplification and     automatic lead switch Digital wave filter to eliminate baseline drift,     AC and EMG interference 60 electrocardiograms record and recall, Built-in rechargeable Li-ion battery, support 2 hours uninterrupted operation AC/DC power supply, automatic protection circuit Thermal recorder, Various Printout Format Accurate lead off detection and display Network Capability     Working Condition:    Environment:       5~40℃      Relative Humidity: 25%~80%    Air Pressure:      860hpa~1060hpa        Voltage:           AC110V/220V    Frequency:         50/60Hz