... light;V1,V3,V5 leads mensuring for Physical examination, time-saving, paper-saving, convenient;Hidden handle. G.MEAS: ... μA Calibrating voltage 1mV±2% Voltage tolerance ±500mV Time constant >3.2s Frequency response 0.05 ~150Hz Noise ... Paper specification 63mmx30m,roll 50mmx20m,rollLCD display .320x240 graphic LCD,display status&waveform. 20x2 character LCD,display status.Safety classification IEC60601-1 ...