... Analysis Modes Lead-off indicator (1)Single channel ECG machine with measurement(2)Manual/Auto/Arrhythmia Analysis Modes(3)Lead-off indicator( ... circuit current:≤0.1µAInput Impedance:>50MΩPatient current leakage:<10µACalibrating voltage:1mV±3%Voltage tolerance:±500mVTime constant:>3. ... speed:25,50mm/s(±3%)Sensitivity:Auto,2.5,5,10,20,40mm/mVRecorder:High resolution thermal printerSafety standard: GB9706 ...