... Mode12 lead acquisition simultaneouslyInput CircuitFloating, Protection against defibrillator and pacemakerA/D Converter18 bitTime Constant≥3.2sFrequency Response0.05Hz~150HzSensitivity2.5, 5 ... , 10, 20 (mm/mV), AutoInput Impedance≥50MΩInput Circuit Current≤50nACalibration Voltage1mV ...