... 1ECG901A machine 1 channel 2,Build in rechargeable Ni-MH battery 3,Chinese/English language 4,Simultaneous 12 leads ... 1ECG901A machine 1 channel2,Build in rechargeable Ni-MH battery3,Chinese/English language4,Simultaneous 12 leads Dimension: ... class I, type CFPower supplyAC : 110V/220V/85~265V,50/60Hz±1Hz;30VADC : 12V(1500mAh) rechargeable Ni-MH batteryFuseAC extend T500mA ...