... preview before printing5. 12-lead simultaneous acquisition and amplification; Record the 12 ECG waveform simultaneous; all-digital and full- ... waveforms and output waveform, net-grid on screen and record paper are the same.7. The latest 120 seconds ... working mode selectable11. 3 Recording mode: Record and not printout, record and printout, no record only printout12. Using unique high-precision digital ...