Product Features: 12 Channel ECG machine with interpretation Manual/Auto/Arrhythmia Analysis modes 215mm 6/12 channel format recording 320*240 graphic 5.7 inch LCD Alphabetic keyboard for inputting patient information Adapt to 110-230v,50/60HZ power supply DC/AC power with built-in rechargeable Li-lon battery Real-time ECG waveform,20 cases save / reply (Expandable) An A4 format printout Simultaneous acquisition of all leads including I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5 and V6. Frequency selectable for both adult and paediatric ECG software optional