Input Circuit Floating; protection against defibrillator effect Lead Standard 12 leads, lead change automatically Patient Current Leakage <50μA Input Impedance ≥50ΜΩ Calibrating Voltage 1mV±3% A/D Converter 12 bit Frequency Response 0.05Hz~150Hz (±3dB) Time Constant >3.2seconds CMRR ≥100dB (with filter) EMG Filter 35Hz (-3dB) / 25Hz (-3dB) Sensitivity 5, 10, 20mm/mV and Auto Sampling Rate 1.25ms Paper Speed 25, 50mm/s Input Circuit Current ≤50μA Safety Standard IEC class I, type CF Power Supply AC: 220V / 110V, 50/60Hz Battery 12V built-in & rechargeable battery, supporting 50 exams Depolarization Voltage ±300mV Noise Level <15μVp-p Dimension 240mm x 310mm x 370mm Net Weight 3.5 Kgs Gross Weight 5.5 Kgs Number of Dots (CCFL LCD) 240 x 128 (dots)