Digital Single Channel ECG Name:ECG Features^3.5'' TFT screen^12 leads simultaneous display^Thermal ... >=50M^Frequency response: 0.05HZ-150HZ(-3dB)^Time constant>3.2s^CMRR:100dB^Dimension of recording paper: 80mm(W)* ... is 10mm/mV+0.2mm/mV^Measurement parameters: HR,P-R interval, P-Duration, QRS Duration,Q-T interval, ... Q-Tc, P Axis, QRS Axis, T Axis,R(V5)+S(V1)^Product safety type: Class I, Type ...